Please help with this question below it would mean so much !

The statistical test in which the mean difference between two groups are compared to a distribution of differences between means is (b) paired-samples t-test.

The t-test, one of the most used statistical tests, is used to ascertain whether the means of two groups are equal. The test's underlying presumption is that samples from normal distributions with similar variances were used for both groups.

The two means are equal, which is the null hypothesis; otherwise, they are not. We can calculate a t-statistic that will follow a t-distribution with n1 + n2 - 2 degrees of freedom under the null hypothesis.

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A particular solution to the differential equation is yo(t) = cos (5t).

To find a particular solution to the differential equation y" - y' + 25y = 5 sin (5t) using the Method of Undetermined Coefficients, we assume a particular solution of the form:

yp(t) = A sin (5t) + B cos (5t)

where A and B are undetermined coefficients that we need to determine.

Taking the derivatives of yp(t), we have:

yp'(t) = 5A cos (5t) - 5B sin (5t)

yp''(t) = -25A sin (5t) - 25B cos (5t)

Substituting these derivatives and yo(t) into the original differential equation, we get:

(-25A sin (5t) - 25B cos (5t)) - (5A cos (5t) - 5B sin (5t)) + 25(A sin (5t) + B cos (5t)) = 5 sin (5t)

Simplifying the equation, we get:

-25A sin (5t) - 25B cos (5t) - 5A cos (5t) + 5B sin (5t) + 25A sin (5t) + 25B cos (5t) = 5 sin (5t)

Canceling out the terms and coefficients, we have:

-5A cos (5t) + 5B sin (5t) = 5 sin (5t)

To satisfy this equation, the coefficients of the trigonometric functions must be equal. Therefore, we have:

-5A = 0 (coefficient of cos (5t))

5B = 5 (coefficient of sin (5t))

Solving these equations, we find A = 0 and B = 1.

Hence, the particular solution to the given differential equation is:

yp(t) = B cos (5t) = cos (5t)

Therefore, a particular solution to the differential equation is yp(t) = cos (5t).

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Answer:

Each ounce contains 20 calories.

Step-by-step explanation:

200/10 = 20/1

20/1 simplified is 20.

Answer:

20 calories per ounce

Step-by-step explanation:

if 200 calories is in 10 ounces of milk, then you can divide 200 by 10; 200 ÷10=20 calories per ounce

Answer:

c)  y = 8\(\sqrt{3}\)

Step-by-step explanation:

in a 30-60-90° Δ the ratio of the sides, respectively, is 1: \(\sqrt{3}\) : 2

if the side opposite the 30°∡ is 8 then 'y' is 8\(\sqrt{3}\) and 'x' is 16

 By multiplying matrices B and A, we obtain the product BA. Using BA, we can solve the system of equations y + 2z = 7, x - y = 3, and 2x + 3y + 4z = 17.the values of x, y, and z are -1, 2, and 1 respectively

To find the product BA, we multiply matrix B with matrix A. The resulting matrix will have the same number of rows as B and the same number of columns as A. The product BA will be used to solve the given system of equations.
The product BA can be computed by multiplying each row of matrix B by each column of matrix A and summing the results. The resulting matrix will be:
Now, we can use the product BA to solve the system of equations:
-10x - 10y + 6z = 7,
3x - 8y + 2z = 3,
-6x - 16y + 15z = 17.

1 -1 2
2 3 1
0 4 2
We can rewrite this system of equations as:
-10x - 10y + 6z = 7,
3x - 8y + 2z = 3,
-6x - 16y + 15z = 17.
By comparing the coefficients of x, y, and z in the system of equations with the entries in the matrix BA, we can determine the values of x, y, and z.
Solving the system of equations using matrix BA, we get:
x = -1,
y = 2,
z = 1.
Therefore, the values of x, y, and z are -1, 2, and 1 respectively.

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The complete question is:
Given A=
⎣2 2 -4|
|-4 2 -4|
|2 -1 5|
, B=
⎣1 -1 0|
⎢2 3 4|
⎢0 1 2|
, find BA and use this to solve the system of equations y+2z=7, x−y=3, 2x+3y+4z=17.

Answer:x − x^{2} − 1.

Step-by-step explanation:

.

Answer:5 weeks

Step-by-step explanation: Multiply the amount of hours and money she gets from baby sitting and chores and add the answers together. This equals 60 dollars a week. 300 divided by 60 is 5.

Step-by-step explanation:

(3x^2-4x)-(5x-x^2)

= 3x^2-4x-5x+x^2

= 3x^2+x^2-4x-5x

= 4x^2-9x

therefore, option B us the correct answer.

By the subtracting the polynomials, 4x² - 9x is correct.

Given polynomial is:

To subtract the given polynomials.

\(\sf (3x^2 - 4x) - (5x - x^2 )}\)

In this polynomial - goes inside the two terms of 2nd polynomial.

\(=\sf 3x^2-4x-5x-x^2\)              

Negative of negative is positive.

\(\sf 3x^2-4x-5x+x^2\)              

Arrange the like terms together.

\(\sf =3x^2+x^2-9x\)      

\(\sf =4x^2 - 9x\)

Writing the terms from highest to lowest degree.

              \(= \sf 4x^2 - 9x\)

\(\sf (3x^2 - 4x) - (5x - x^2 )=\bold{4x^2 - 9x}\).

Thus, by the subtracting the polynomials, 4x² - 9x is correct.

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Answer:

They are not Congruent = A

Step-by-step explanation:

Its not congruent because the left one is slightly a little bit bigger than the right. If you look close enough you can see that. Plus if you add the lines together the right one is slightly tilted.

Answer:

x is corresponding with the angle that equals 130 so it equals 130 too

Step-by-step explanation:

Answer:

Step-by-step explanation:

City Carpet and Flooring advertises that they can install 1,200 square feet

of carpet in 2 hours. Select whether each installation rate has the same

unit rate, in square feet per hour, as City Carpet and Flooring. 7.RP.1,7.NS.3

Yes No

0

0

0

0

960 square feet of carpet in 2 hours

1,000 square feet of carpet in 12 hours

320 square feet of carpet in hour

Answer:

um we cant hear the sound part so

Step-by-step explanation:

Answer: Enlargement

Step-by-step explanation: If the number is larger than 1 it is an enlargement if it is smaller it is a reduction.

Answer:

It would be an enlargement

Step-by-step explanation:

You are moving each point 2.5 units out

Answer:

Because Elena receives a higher value per hour, she earns $16.8 more than Jada.

Step-by-step explanation:

Giving the following information:

Elena:

y=8.40x

Jada:

y= 7x

We need to calculate the total income for 12 hours:

Elena:

y=8.40*12

y= $100.8

Jada:

y= 7*12

y= $84

Because Elena receives a higher value per hour, she earns $16.8 more than Jada.

Answer:

4

Step-by-step explanation:

4/1 or 4

y over x, and simplify

Answer:

1 by 2 is o

Step-by-step explanation:

so slope is 1 by 2 of o .

Answer:

72 = -4s

72 / (-4) = (-4s) / (-4)

-18 = s

Answer:

option A is correct answer

divide both sides with 2

hope it helps

Answer:

option A is the right condition to be fulfilled to solve the equation.

Mark Brainliest if correct:

x = -2, 9

Step-by-step explanation:

x2: x + 2 = 0

x = -2

x1: x - 9 = 0

x = 9

x = -2, 9

Answer:

Answer would be 1/81 or 0.01 as a decimal rounded to the nearest hundredth

Logical Error: In computer programming language, a logic error is a bug or in a program or code that causes it to operate incorrectly, but not to terminate abnormally (or crash).

A logic error developed unintended or undesired output or other behavior, although it may not immediately be recognized as such.

For example, assigning a value to the wrong variable may cause a many of unexpected program errors.

These errors can be programmer mistakes or sometimes machine less memory to load the code.

if(x>=5) {

// program

}

else if(x==5) {

//program

}

else(x<=5) {

//program

}

they all do not give any error.

x=5 gave an error because it is value assigning to 5.

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Answer:

955

Step-by-step explanation:

8 squared = 64

x 3 X 5 = 960

-5

= 955

Answer:

equivalent is the aswer

Answer: 5. x=33, y= 33, z=114

Step-by-step explanation: the triangles and supplementary lines all add to 180, so find one of them, and use that one to find the others

Answer:

180 degrees

Step-by-step explanation:

1. Subtract the two known angles from 180 degrees.

2. Plug the two angles into the formula and use algebra: A+B+C= 180 degrees.

Hope this helped.

The probability that neither test is positive if steroids have been used is; 0.02

We are told that;

Probability of test A being positive if steroids have been used is; P(A is positive) = 0.9

Probability of test B being positive if steroids have been used is; P(B is positive) = 0.8

Thus;

P(Both A & B are positive if steroids have been used) = 0.9 * 0.8 = 0.72

P(A is positive and B is not positive if steroids have been used ) = 0.9 * (1 - 0.8) = 0.18

P(A is not positive and B is positive if steroids have been used ) =  (1 - 0.9)  * 0.8 = 0.08

P(Neither A nor B are positive if steroids have been used) = 0.1 * 0.2 = 0.02

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The given inequality is

The given coordinates are (7,4), (3.8, 4) and (0,9).

Let's evaluate each coordinated pair in the inequality to see which one satisfies it.

For (7,4).

Since 3 is not more than 8, we say (7,4) is not a solution.

For (3.8, 4).

Since -0.2 is not more than 8, we say (3.8, 4) is not a solution.

For (0,9).

Since -9 is not more than 8, we say (0,9) is not a solution.

Answer:

a) 390

b) 239

c) 151

Step-by-step explanation:

a) 30 + 15 + 45 + 300 = 390

b) 160 + 30 + 9 + 40 = 239

c) 390 (income) - 249 (expenses) = 151 pounds (profit)

The 1-tree lower bound is a valid lower bound on the solution to the Traveling Salesman Problem (TSP) because it provides a lower limit on the optimal solution's cost.

To understand why the 1-tree lower bound is valid, let's consider the definition of the TSP. In the TSP, we are given a complete graph with vertices representing cities and edges representing the distances between the cities. The goal is to find the shortest Hamiltonian cycle that visits each city exactly once and returns to the starting city.

In the context of the 1-tree lower bound, we start with a given vertex v and compute a minimum spanning tree (MST) T on the graph G excluding the vertex v. An MST is a tree that spans all the vertices with the minimum total edge weight. It ensures that we have a connected subgraph that visits each vertex exactly once.

Adding the two shortest edges from v to T creates a 1-tree. This 1-tree connects the vertex v to the MST T. By construction, the 1-tree includes all the vertices of the original graph G and has a total weight that is at least as large as the weight of the optimal solution.

Now, let's consider the Hamiltonian cycle of the TSP. Any Hamiltonian cycle must contain an edge that connects the vertex v to the MST T because we need to return to the starting vertex after visiting all other cities. Therefore, the optimal solution must have a cost that is at least as large as the cost of the 1-tree.

By using the 1-tree lower bound, we have effectively obtained a lower limit on the optimal solution's cost. If we find a better solution with a smaller cost, it means that the 1-tree lower bound was not tight for that particular instance of the TSP.

In summary, the 1-tree lower bound is a valid lower bound on the TSP because it constructs a subgraph that includes all the vertices and has a cost that is at least as large as the optimal solution. It provides a useful estimate for evaluating the quality of potential solutions and can guide the search for an optimal solution in solving the TSP.

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If we define our population as all the households in the city of Chicago and use the Chicago telephone directory to draw our sample units, we would likely have a survey with sample frame error. Correct option is A.

Sample frame error occurs when the sampling frame, in this case, the Chicago telephone directory, does not accurately represent the population of interest.

In this case, the telephone directory would exclude households without a landline phone or those who choose not to have their phone number listed. This means that the sample would not include all households in the population, leading to biased results.

A representative survey (option B) would be one in which the sample accurately represents the population in terms of relevant characteristics such as age, gender, income, education, and other important demographic factors.

In contrast, a survey containing error (option C) is a general term that includes both sampling error and non-sampling error, such as measurement error or response bias.

Finally, a census (option D) is a study in which data is collected from all individuals or units in a population, not just a sample. Therefore, using a telephone directory to draw a sample from the population does not constitute a census.

In conclusion, using the Chicago telephone directory to draw a sample of households would likely result in a survey with sample frame error, which can lead to biased results and limit the generalizability of the findings to the entire population.

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Answer: M^5

Step-by-step explanation: M•M•M•M•M

Answer:

M^5

Step-by-step explanation:

M×M×M×M×M =M^5