If Audrey wanted to solve this equation using the square root method, which answer shows the correct sequence of steps?

ValRented a bicycle while she was on vacation she-paid a flat rental fee of $55.00 plus $8.50 each day the total cost was $123 w

Butoxors [25]

Answer:

(123-55) / 8.5

I think that should be correct.

Step-by-step explanation:

4 0

2 years ago

Use the formula A = h(b1 + b2).<br> What is the area of the trapezoid?<br> square units

deff fn [24]

Only use h=trapezoid's height.

b=base

4 0

3 years ago

Read 2 more answers

If a test of H subscript 0 colon space mu subscript D equals 0 space v s. space H subscript a colon space space mu subscript D g

lara [203]

Answer:

$p_v =P(t_{(n-1)}>t_{calculated}) =0.0601$

The p value on this case is given by the problem.

If we compare the p value with a significance level assumed $\alpha=0.05$ , we see that $p_v > \alpha$ and we can conclude that we FAIL to reject the null hypothesis that the difference mean between after and before is less or equal than 0.

Step-by-step explanation:

A paired t-test is used to compare two population means where you have two samples in which observations in one sample can be paired with observations in the other sample. For example if we have Before-and-after observations (This problem) we can use it.

Let put some notation

x=test value before , y = test value after

The system of hypothesis for this case are:

Null hypothesis: $\mu_y- \mu_x \leq 0$

Alternative hypothesis: $\mu_y -\mu_x >0$

The first step is calculate the difference $d_i=y_i-x_i$

The second step is calculate the mean difference

$\bar d= \frac{\sum_{i=1}^n d_i}{n}$

The third step would be calculate the standard deviation for the differences, and we got:

$s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1}$

The 4 step is calculate the statistic given by :

$t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=t_{calculated}$

The next step is calculate the degrees of freedom given by:

$df=n-1$

Now we can calculate the p value, since we have a right tailed test the p value is given by:

$p_v =P(t_{(n-1)}>t_{calculated}) =0.0601$

The p value on this case is given by the problem.

If we compare the p value with a significance level assumed $\alpha=0.05$ , we see that $p_v > \alpha$ and we can conclude that we FAIL to reject the null hypothesis that the difference mean between after and before is less or equal than 0.

4 0

3 years ago

A study of video game usage and eyesight was looked at 400 high school students. For each student who plays games, the investiga

Svetllana [295]

Answer:

Explanation is in a file

Step-by-step explanation:

5 0

2 years ago

Suppose that you toss a fair six-sided {1,2,3,4,5,6} die and let X represent the outcome obtained. Find the expected volume of a

timofeeve [1]

Answer:

The expected volume of the box is 364 cubic inches.

Step-by-step explanation:

Since the die is fair, then P(X=k) = 1/6 for any k in {1,2,3,4,5,6}. Let Y represent the volume of the box in cubic inches. For how the box is formed, Y = X²*24. Thus, the value of Y depends directly on the value of X, and we have

(When X = 1) Y = 1²*24 = 24, with probability 1/6 (the same than P(X=1)

(When X = 2) Y = 2²*24 = 96, with probability 1/6 (the same than P(X=2)

(When X = 3) Y = 3²*24 = 216, with probability 1/6 (the same than P(X=3)

(When X = 4) Y = 4²*24 = 384, with probability 1/6 (the same than P(X=4)

(When X = 5) Y = 5²*24 = 600, with probability 1/6 (the same than P(X=5)

(When X = 6) Y = 6²*24 = 864, with probability 1/6 (the same than P(X=6)

As a consequence, the expected volume of the box in cubic inches is

E(Y) = 1/6 * 24 + 1/6*96 + 1/6*216+ 1/6*384+ 1/6*600+1/6*864 = 364

3 0

2 years ago