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3 years ago

13

PLEASE HELP FPR BRAINLIEST SNSWER!!!!!!!!!! THIS QUESTION CONFUESD ME!!!

1 answer:

olga nikolaevna [1]3 years ago

8 0

D.) 13.8 good luck byeeeee

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In preparation for an earnings report, a large retailer wants to estimate p= the proportion of annual sales

mr Goodwill [35]

Using the z-distribution, it is found that the 95% confidence interval for the proportion of sales that occured in December is (0.1648, 0.2948).

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

In this problem, we have a 95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so the critical value is z = 1.96.

The sample size and the estimate are given by:

$n = 161, \pi = \frac{37}{161} = 0.2298$

Hence:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2298 - 1.96\sqrt{\frac{0.2298(0.7702)}{161}} = 0.1648$

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2298 + 1.96\sqrt{\frac{0.2298(0.7702)}{161}} = 0.2948$

The 95% confidence interval for the proportion of sales that occured in December is (0.1648, 0.2948).

More can be learned about the z-distribution at brainly.com/question/25890103

5 0

2 years ago

The goal of a toy drive is to donate more than 1000 toys. The toy drive already has collected 300 toys. How many more toys does

Brilliant_brown [7]

Answer:

Let t be the number of toys.

Since, the toy drive already has collected 300 toys

⇒ t+ 300

Also, it is given that the goal of a toy drive is to donate more than 1000 toys.

We get an inequality:

⇒ $t + 300 > 1000$

Solve an inequality:

$t + 300 > 1000$

Subtract 300 from both sides we get

$t + 300 -300 > 1000-300$

Simplify:

t > 700

Therefore, more than 700 toys does the toy drive need to meet its goal.

An inequality is; $t + 300 > 1000$ ; t > 700

7 0

3 years ago

9times 2/3 and than in simplest form

Alex17521 [72]

18/3 then it will be 6

7 0

3 years ago

Find the supplement of 1/5 of complete angle

9966 [12]

The supplement of 1/5 of a complete angle is 150degrees

4 0

3 years ago

Lucy bought 6 notebooks for $15.30. What is the cost of a notebook, in dollars, if all the notebooks cost the same?

Margaret [11]

Answer: Each notebook cost $2.55

Step-by-step explanation:

You divide $15.30 by 6, which equals $2.55.

5 0

3 years ago

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