Though there is a correlation between life span and education levels, where the higher your education, the higher your life span, other factors influence how long you life, most notably, of course your fitness levels, health, and diet. Thus, if you want to live longer, it is better to invest your time and effort into those three things instead of attending a postsecondary institution.

8 0

3 years ago

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Use the sample data and confidence level given below to complete parts a through d.

4vir4ik [10]

Using the information given and the z-distribution, it is found that:

a) The point estimate of the population proportion is 0.5544.

b) The margin of error is: 0.0320.

c) The interval is: (0.5224, 0.5864).

d) The interpretation of the interval is: we are 95% sure that the true population proportion is between 0.5224 and 0.5864.

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

A confidence interval of proportions has the bounds given by the rule presented as follows:

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

In which the variables used to calculated these bounds are listed as follows:

$\pi$ is the point estimate of the population proportion.

z is the critical value.

n is the sample size.

The confidence level is of 95%, hence the critical value 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.

From the sample, the sample size and the point estimate are given as follows:

$n = 929, \pi = \frac{515}{929} = 0.5544$

The margin of error is given by:

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

$M = 1.96\sqrt{\frac{0.5544(0.4456)}{929}}$

M = 0.0320.

The interval is the point estimate plus/minus the margin of error, hence:

Lower bound: 0.5544 - 0.0320 = 0.5224.

Upper bound: 0.5544 + 0.0320 = 0.5864.

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

#SPJ1

4 0

1 year ago

10. The key to description is A. telling the reader how you would do something. B. considering only what you think the re

MArishka [77]

I think the answer here is D. A seems wrong because it involves your opinion as a writer which should not be involved in a description. B is wrong because you should always assume that the reader knows nothing about the subject when writing a description. C is wrong because all steps should be outlined in a description. Finally, D is correct because a description should be detailed and easy to follow. Hope that helps!

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3 years ago

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