A university financial aid office polled a random sample of 695 male undergradua

Question

A university financial aid office polled a random sample of 695 male undergraduate students and 760 female undergraduate students. Each of the students was asked whether or not they were employed during the previous summer. 383 of the male students and 478 of the female students said that they had worked during the previous summer. Give a 99 % confidence interval for the difference between the proportions of male and female students who were employed during the summer Step 2 of 4: Find the critical value that should be used in constructing the confidence interval. Tables Keypad Answer How to enter your answer Previous Step Answers

Explanation / Answer

In hypothesis testing, a critical value is a point on the test distribution that is compared to the test statistic to determine whether to reject the null hypothesis. If the absolute value of your test statistic is greater than thecritical value, you can declare statistical significance and reject the null hypothesis.

For 99% confidence interval:

z critical = 2.575 or 2.58

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