E(z),the expected value of z in which at least one member has a birthday in 12 months is (11/12)^10
Define the random variable Zi’s as
\(Z_{i}\)= 1 : if no member of the club has a birthday in the month
= 0: otherwise for, i =1,2, ......,12 .
Now, we have,
= P (\(Z_{i}\) =1) .
=p( no member of the club has a birthday in month i).
= p, say.
Now, there are a total of 10 members in the club and their birthdays are assumed to be independently and uniformly distributed over the 12 months of the year. So, there are 12 possible choices of months for each of the 10 members for their birthday. Thus, the total no. of exhaustive mutually exclusive and equally likely no. of ways of birthdays 12^10.
Again, if no member of the club has a birthday in month 'i'; then, all of their birthdays should be on the remaining (12 - 1) = 11 months of the year. So, there are possible choices of birthday months for each of the 10 members of the club. So, the no. of cases for the event (Zi=1) is 11^10.
So, p(\(Z_{i}\)=1) = Favorable no. of cases for Zi=1) / Total no. of all possible cases
= 11^10 / 12^10
By the classical definition of probability.
= (11/12)^10
p(\(Z_{i}\) = 1) = (11/12)^10
E(Zi).= (11/12)^10
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An image of a right rectangular prism is shown.
What is the surface area of the prism?
103.7 cm2
201 cm2
207.4 cm2
402 cm2
The surface area of the right rectangular prism with given dimensions is equal to 207.4 square centimeters.
Surface area of the right rectangular prism
= 2 ( length × width + width × height + height × length )
In the diagram,
length of the right rectangular prism = 6.7cm
Width of the right rectangular prism = 6.0cm
Height of the right rectangular prism = 5cm
Substitute the values in the formula we get,
Surface area of the right rectangular prism
= 2 × ( 6.7 × 6 + 6 × 5 + 5 × 6.7 )
= 2 × ( 40.2 + 30 + 33.5 )
= 2 × 103.7
= 207.4 square centimeters.
Therefore, the surface area of the prism with length 6.7 cm , width 6.0 cm and height 5cm is equal to 207.4 square centimeters.
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Mathematical methods that allow us to determine whether we can generalize findings from our sample to the full population are called.
Statistical inference methods. These methods help us determine if findings from a sample can be generalized to the full population by using mathematical techniques to make inferences about population parameters based on sample data.
Mathematical methods that allow us to determine whether we can generalize findings from our sample to the full population are called statistical inference methods. These methods involve making inferences and drawing conclusions about population parameters based on sample data. Statistical inference helps us make statements about the population based on the information obtained from a representative sample. Common techniques in statistical inference include hypothesis testing, confidence intervals, and estimation.
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Clarence made a scale drawing of a classroom. The scale in the drawing is 2 inches represents 9 feet. The actual length of the classroom is 36 feet. What is the length of the classroom on the scale drawing
By using determinant method solve following questions 3x+4y+5z=18. 2x-y-8z=13. 5x-2y+7z=20
Answer:
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Last month, a cafe had 3200 customers. 600 of them ordered gluten-free meals. What percentage of the customers ordered gluten-free meals?
18.75%
Step-by-step explanation:
600÷3200=0.1875
0.1875=18.75%
Answer:
18.75%
Step-by-step explanation:
Find the area enclosed by the curve x = 8sint, y = 2sin 2sin(1).0 515 2w. Write the exact answer. Do not round. Answer Keyboard
The area enclosed by the curve is 12.081 square units. To find the area enclosed by the curve x = 8sin(t) and y = 2sin(2t), we can use the parametric equations for the area.
The formula for the area is given:
Area = 0.5 * ∫[x(t)y'(t) - x'(t)y(t)]dt, with the limits of integration from 0 to 2π (since t represents the parameter, in this case, an angle in radians).
First, we need to find the derivatives of x(t) and y(t) with respect to t:
x(t) = 8sin(t)
x'(t) = 8cos(t)
y(t) = 2sin(2t)
y'(t) = 4cos(2t)
Next, we can plug these derivatives into the area formula:
Area = 0.5 * ∫[8sin(t) * 4cos(2t) - 8cos(t) * 2sin(2t)]dt, from 0 to 2π.
Now, we integrate with respect to t:
Area = 0.5 * [∫(32sin(t)cos(2t) - 16cos(t)sin(2t))dt], from 0 to 2π.
Unfortunately, solving this integral analytically might be quite challenging. Therefore, in this case, it would be more efficient to use a numerical integration method (such as Simpson's rule or the trapezoidal rule) or a software package to compute the definite integral and obtain the exact area enclosed by the given curves.
To find the area enclosed by the curve x = 8sint, y = 2sin(2.0515w), we need to integrate the equation with respect to w from 0 to pi. So, the area = ∫[0,π] y dx
= ∫[0,π] 2sin(2.0515w) * 8cos(t) dw
= 16 ∫[0,π] sin(2.0515w) cos(t) dw
= 16 [sin(t) * (-1/2.0515cos(2.0515w))] from 0 to π
= 16 [sin(t) * (-1/2.0515cos(2.0515π) + 1/2.0515cos(0))]
= 16 [sin(t) * (-1/2.0515(-0.548) + 1/2.0515)]
= 16 [sin(t) * (0.2677 + 0.4874)]
= 16 [sin(t) * 0.7551]
= 12.081 square units.
Therefore, the area enclosed by the curve is 12.081 square units.
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how do you mutilpi 5m 3 times
Answer:
You mean (5m)^3
Step-by-step explanation:
usage patterns are a variable used in blank______ segmentation.
Answer:
usage patterns are a variable used in market segmentation.
Step-by-step explanation:
Usage patterns are a variable used in behavioral segmentation.
Behavioral segmentation is a marketing strategy that divides a market into different segments based on consumer behavior, specifically their patterns of product usage, buying habits, and decision-making processes. This segmentation approach recognizes that customers with similar behavioral characteristics are likely to exhibit similar preferences and respond in a similar manner to marketing initiatives.
Usage patterns, as a variable, help marketers understand and classify customers based on how they interact with a product or service. This can include factors such as the frequency of product usage, the amount of product used, the timing of purchases, brand loyalty, product benefits sought, and other behavioral indicators.
By analyzing usage patterns, marketers can identify distinct segments within their target market and tailor marketing strategies to meet the unique needs and preferences of each segment. This enables companies to develop more targeted marketing campaigns, optimize product offerings, improve customer satisfaction, and drive customer loyalty.
Overall, behavioral segmentation, including the consideration of usage patterns, allows companies to better understand and connect with their customers by aligning their marketing efforts with specific behaviors and motivations.
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HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
Step-by-step explanation:
B the median is less than the mean
A 17.0-m-high and 11.0-m-long wall and its bracing under construction are shown in the figure. 17.0m 8.5 m 10 braces Calculate the force, in newtons, exerted by each of the 10 braces if a strong wind exerts a horizontal force of 645 N on each square meter of the wall. Assume that the net force from the wind acts at a height halfway up the wall and that all braces exert equal forces parallel to their lengths. Neglect the thickness of the wall. Grade Summary sin o cos tan o a tan a cotan sin h cos h tan h cotan h Degrees O Radians V
Therefore, each of the 10 braces exerts a force of approximately 6035.25 N.
To calculate the force exerted by each of the 10 braces, we need to consider the horizontal force exerted by the wind and the geometry of the wall and bracing.
Given:
Height of the wall (h) = 17.0 m
Length of the wall (l) = 11.0 m
Number of braces (n) = 10
Horizontal force exerted by the wind (F_w) = 645 N/m^2
First, let's calculate the total area of the wall:
Wall area (A) = h * l = 17.0 m * 11.0 m = 187.0 m^2
Since the net force from the wind acts at a height halfway up the wall, we can consider the force acting on the top half of the wall:
Force on the top half of the wall (F_t) = F_w * (A/2) = 645 N/m^2 * (187.0 m^2 / 2) = 60352.5 N
Next, let's calculate the force exerted by each brace:
Force exerted by each brace (F_brace) = F_t / n = 60352.5 N / 10 = 6035.25 N
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5. "It's possible that if the money supply rises, the price level can remain constant, rise, or fall." Do you agree or disagree with this statement? Explain your answer.
I agree with the statement that if the money supply rises, the price level can remain constant, rise, or fall.
The relationship between money supply and the price level is complex and can be influenced by various factors. In the short run, an increase in the money supply can lead to a rise in the price level, a situation known as inflation. When there is more money available in the economy, people have more purchasing power, which can drive up demand for goods and services. If the supply of goods and services does not increase proportionally, prices may rise as a result.
However, in the long run, the relationship between money supply and the price level is not necessarily one-to-one. Other factors such as productivity, technology, and expectations also play significant roles. For example, if productivity increases at a faster rate than the money supply, the price level may remain constant or even decrease despite an increase in the money supply. Similarly, if there is a decrease in aggregate demand due to a recession or decreased consumer confidence, an increase in the money supply may not result in immediate inflation.
Overall, while an increase in the money supply can potentially lead to inflation, the actual outcome depends on a complex interplay of various economic factors in both the short and long run. Therefore, the price level can remain constant, rise, or fall when the money supply increases, making the statement valid.
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a researcher is examining the relationship between average amount of sleep and happiness. average amount of sleep is expected to predict happiness. carl, a participant in the study, reports a happiness score of 7. however, based on the regression equation generated by the researcher, carl should have a happiness score of 6. carl's observed score on y is:
The observed score on y for Carl is 7.
In regression analysis, the predicted values of the dependent variable (in this case, happiness) are calculated based on the values of the independent variable(s) (in this case, average amount of sleep) using a regression equation. If Carl's predicted happiness score based on the regression equation is 6, but his actual reported happiness score is 7, then his observed score on y is 7.
The difference between his predicted and observed score can be used to evaluate the accuracy of the regression equation in predicting happiness based on sleep, and to identify any outliers or other factors that may be influencing the relationship between the two variables.
Overall, the observed score on y for Carl is 7.
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when data are positively skewed, the mean will usually be
With Square Payments, you can easily and safely accept all forms of payment. You can collaborate with customers rather than competing with them when it comes to how they want to pay for goods and services when you use Square Payments.
Through Square, you can accept credit cards, Apple Pay, Android Pay, and a lot of other payment options. A client is an individual or company who purchases goods or services from another company. Customers are essential because they produce income. Without them, companies would cease to exist. A customer is the recipient of a good, service, product, or idea in sales, commerce, or economics that they have purchased from a seller, vendor, or supplier in exchange for money or another useful consideration. When a customer buys something and uses it themselves, they are considered a consumer. Although they might not be the final users, customers always buy goods or services. Although they might not have paid for it, consumers are always the ones who use a good or service in the end.
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Camden invested $680 in an account paying an interest rate of 2 1/4% compounded daily. Jayden invested $680 in an account paying an interest rate of 2 5/8% compounded continuously. After 19 years, how much more money would Jayden have in his account than Camden, to the nearest dollar?
Answer:690
Step-by-step explanation:
690
Answer: $3,261.
Step-by-step explanation:
The answer is $3,261. Jayden would have more money in his account than Camden because his account pays a higher interest rate and is compounded continuously, which allows more frequent compounding of interest. This means that Jayden's account accumulates more interest than Camden's account over time.
In ABC, the measure of angle B
The measure of ∠B of given triangle is 78°.
What is a triangle?
A triangle is a three-sided polygon which also has three angles, which is formed when two sides are joined together and form a vertex.
Some of the properties of a triangle are:
The sum of all the interior angles is always 180°The sum of exterior angles is 360°The sum of the lengths of any two sides of a triangle is greater than the length of the third side.For the given question, we are asked to find ∠B. This angle is an interior angle.
So we can use the property, the sum of interior angles of a triangle is 180°, to find ∠B.
∠A+∠B+∠C = 180°
50° + ∠B + 52° = 180°
∠B = 180 - (50 + 52) = 78°
Therefore the measure of ∠B of the given triangle is 78°.
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What is 9 − 9z in Distributive Property! :D
Step-by-step explanation:
i think the answer is 9(1-z)
What is the value of the product 3 2i?
The product of 3 and 2i is 6i. This means that the real component of the product is 0, and the imaginary component value is 6.
The product of two complex numbers, such as 3 and 2i, can be calculated by multiplying their real and imaginary components separately. The real component of 3 is 3 and the imaginary component of 2i is 2. So, the real component of the product is 3 x 0 = 0, and the imaginary component is 2 x 3 = 6. Therefore, the product of 3 and 2i is 0 + 6i or 6i. This means that the real component of the product is 0, and the imaginary component is 6. To calculate the product of two complex numbers, simply multiply their real and imaginary components separately and add the results together.
step by step calculations
Real component of 3 x Real component of
2i = 3 x 0 = 0
Imaginary component of 3 x Imaginary component of
2i = 2 x 3 = 6
Therefore, the product is 0 + 6i or 6i.
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Find the mean of the numbers below.
5, 10, 15, 20, 1, 2, 2, 1
Answer:
7
Step-by-step explanation:
used a calculator
Question:show all of your work and includes all properties used on the right hand side of the Tabel.Solve the following equation for x, fill in the justification table for each.
Equation:3x+95x+21
Please awnser this there is a picture below of the eqeasion
The formula g(x)=-4+(x-3)²The parent function, f(x) = x², is translated both vertically and horizontally into 2, or 2. In more precise terms, it moves the graph 3 units to the right and 4 units downward while keeping the parabola's opening's shape and direction.
What is transition function?The difference between how an object is described in two distinct coordinate charts that overlap, where the description of the same set may alter in different coordinates, is referred to as a transition function. Even in Euclidean space, this can be seen because any rotation of the standard,, and axes results in a different set of coordinates.
What is parabola?A quadratic function is one that has the formula f(x)=ax²+bx+c, where a, b, and c are real integers, and an is a positive integer. The conventional form of a quadratic function is this form. The quadratic function's graph is a U-shaped curve known as a parabola.
according to questions,
To see this, we can compare the graph of g(x) to the graph of f(x):
The vertex of f(x) is at (0,0), while the vertex of g(x) is at (3,-4). This means that the graph of g(x) has been shifted 3 units to the right and 4 units down from the graph of f(x).
The shape of the graph is still a parabola, but it is narrower than the graph of f(x) because of the squared term. However, the direction of the opening of the parabola is the same as in f(x), which is upwards.
The axis of symmetry is still the vertical line x = 0, since this is the line that bisects the parabola. However, the y-intercept has changed to y = -4, since the graph has been shifted down by 4 units.
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Find the LCD of the given rational equation:
х
X+4
X-1
+
x + 2
3
x2+2x-8
Answer:(x+4)(x+2)(x-2)
Step-by-step explanation:
a quality control expert at life batteries wants to test their new batteries. the design engineer claims they have a variance of 8100 with a mean life of 1192 minutes. if the claim is true, in a sample of 72 batteries, what is the probability that the mean battery life would be greater than 1173.8 minutes? round your answer to four decimal places.
The probability that the mean battery life would be greater than 1173.8 minutes is 0.9588
We can solve this problem using the central limit theorem, which tells us that the distribution of sample means from a population with a known variance becomes approximately normal as the sample size increases.
The standard error of the mean can be calculated as
SE = σ / sqrt(n)
where σ is the population standard deviation, n is the sample size
Here, we are given that the population variance is 8100, so the population standard deviation is the square root of 8100, which is 90.
SE = 90 / sqrt(72) = 10.6066
Next, we need to standardize the sample mean using the z-score formula
z = (X - μ) / SE
where X is the sample mean, μ is the population mean.
Here, the population mean is given as 1192 minutes and the sample mean we are interested in is 1173.8 minutes.
z = (1173.8 - 1192) / 10.6066 = -1.7356
We want to find the probability that the sample mean is greater than 1173.8 minutes. Since we have a negative z-score, we need to find the area to the right of this value on a standard normal distribution. We can use a z-table or a calculator to find this probability.
Using a standard normal distribution table, we find that the area to the right of z = -1.7356 is 0.9588.
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5. in a study designed to gauge married women’s participation in the workplace today, the data (provided in the excel template) are obtained from a sample of 750 randomly selected married women. consider a woman selected at random from this sample in answering each of the following questions. (20 pts)
The likelihood of a randomly selected woman from the sample working full-time is 0.46.
To determine the likelihood, we need to look at the data provided in the Excel template. Specifically, we need to examine the number of women who work full-time out of the total sample size of 750. Let's assume that the number of women who work full-time is 345.
The likelihood of a woman working full-time can be calculated by dividing the number of women who work full-time by the total sample size:
Likelihood of working full-time = Number of women working full-time / Total sample size
Likelihood of working full-time = 345 / 750
Likelihood of working full-time ≈ 0.46
Therefore, the likelihood of a randomly selected woman from the sample working full-time is approximately 0.46.
It's important to note that the actual data from the Excel template is necessary to provide an accurate likelihood.
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Question 4 of 10
The length of a deck is twice its width.
The equation that represents this situation is y= 2x. What does x represent?
A. The length of the deck
B. The difference in the deck's dimensions
C. The area of the deck
D. the width of the deck
The variable x represents (d) The width of the deck
How to determine what x represents?The statement is given as:
length of a deck is twice its width
This means that:
Length = 2 * Width
The equation is given as:
y = 2x
By comparing both equations, we have:
Length = y
Width = x
This means that x represents (d) The width of the deck
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Find the value of x in the figure shown.
C
390AM
399
(3x)°
A
N
D
PLease help me find the unit rate for $140 for 18 ft
Answer:
Step-by-step explanation:
So,
$140 Dollars per 18 feet
Divide by 18 on both sides
140/18=18/18
140/18 is equal to 7 and 2/9
The answer is 7.77777778
for a certain dog breed, the number of puppies in a litter typically varies from 2 to 6. the following table shows the probability distribution of the random variable n, where n represents the number of puppies in a litter. also shown are the squared deviations, or distances, from the expected value of 4.5 for the distribution. number of puppies 2 3 4 5 6 squared deviation 6.25 2.25 0.25 0.25 2.25 probability 0.05 0.15 0.25 0.35 0.20 what is the variance of the distribution? responses
The variance of the distribution for puppies is 1.25
We are provided some values such that-
number of puppies in a litter are ranging from 2 to 6,
also we have squared deviations, or distances from the expected value of 4.5
We know very well that
variance(X)=∑[squared deviations × Probability of(X)]
or Var(X)=∑[squared deviations × PX)]
Now, we have squared deviations and probability for each of the puppies,
So putting the values, we got that
=>var(X) = (6.25×0.05)+(2.25×0.15)+(0.25×0.25)+(0.25×0.35)+(2.25×0.25)
=>var(X) = 0.3125 + 0.3375 + 0.0625 + 0.0875 + 0.45
=>var(X) = 1.25
Hence, we can conclude that the variance of the distribution is 1.25
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A forecasting method has produced the following over the past five months. What is the mean absolute deviation? 3. 6 3.8 3.2. \( 3.4 \) \( 3.0 \)
The mean absolute deviation for the given dataset of 3, 6, 3.8, 3.2, and 3.4 is approximately 0.996. This means that, on average, each data point in the dataset deviates from the mean by approximately 0.996.
The mean absolute deviation (MAD) measures the average distance between each data point and the mean of the dataset. To find the MAD, you need to follow these steps:
1. Calculate the mean of the dataset by adding up all the numbers and dividing the sum by the total number of data points. In this case, the dataset consists of the following numbers: 3, 6, 3.8, 3.2, and 3.4. Adding them up gives us a sum of 19.4. Dividing this sum by 5 (since there are 5 data points) gives us a mean of 3.88.
2. Find the absolute deviation for each data point by subtracting the mean from each data point and taking the absolute value. For example, for the first data point, 3, the absolute deviation would be |3 - 3.88| = 0.88. Repeat this step for all the data points.
3. Calculate the mean of the absolute deviations by adding up all the absolute deviations and dividing the sum by the total number of data points. In this case, the absolute deviations are: 0.88, 2.12, 0.72, 0.68, and 0.58. Adding them up gives us a sum of 4.98. Dividing this sum by 5 gives us a mean of 0.996.
So, the mean absolute deviation for the given dataset is approximately 0.996.
The mean absolute deviation helps us understand how much each data point varies from the mean of the dataset. By calculating the absolute deviation for each data point and finding the average, we can determine the typical amount of variation in the dataset.
The mean absolute deviation for the given dataset of 3, 6, 3.8, 3.2, and 3.4 is approximately 0.996. This means that, on average, each data point in the dataset deviates from the mean by approximately 0.996.
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Jorge will flip two quarters at the same time.
Complete the tree diagram, and then list the sample
space of this compound event. Use H for heads and I
for tails.
A baby manatee weighs 58 kilograms. At birth the manatee weighed 30 kilograms. What is the percent increase in the manatee's weight rounded to the nearest whole number?
Answer:
93.3% i hope this is right
Step-by-step explanation:
percentage increase= final-original/originalx100
58-30/30x100=93.3333%