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In a Harris poll of 630 human resource professionals, 37.4 % said that they had at least one child by the age of 30 years. Among the 630 professionals who were surveyed, how many of them said they had at least one child before 30 years of age. Construct a 99% confidence interval estimate for the proportion of all human resource professionals with at least one child before 30 years of age. Repeat part above using a confidence interval level of 90%. Compare the confidence intervals from both parts above and identify the interval that is wider. Why is it wider?

In a Harris poll of 630 human resource professionals, 37.4 % said that they had at least one child by the age of 30 years. Among the 630 professionals who were surveyed, how many of them said they had at least one child before 30 years of age. Construct a 99% confidence interval estimate for the proportion of all human resource professionals with at least one child before 30 years of age. Repeat part above using a confidence interval level of 90%. Compare the confidence intervals from both parts above and identify the interval that is wider. Why is it wider?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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In a Harris poll of 630 human resource professionals, 37.4 % said that they had at least one child by the age of 30 years.

Among the 630 professionals who were surveyed, how many of them said they had at least one child before 30 years of age.

Construct a 99% confidence interval estimate for the proportion of all human resource professionals with at least one child before 30 years of age.

Repeat part above using a confidence interval level of 90%.

Compare the confidence intervals from both parts above and identify the interval that is wider. Why is it wider?

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