(Answered):Week 5 Assignment 56 . . . .

Question Description

Week 5 Assignment

Question 1

In a poll of 725 voters in a campaign to eliminate non-returnable beverage containers, 510 of the voters were opposed. Develop a 95% confidence interval estimate for the proportion of all the voters who opposed the container control bill.

Question 2

A random sample of 25 airline pilots had an average yearly income of $101,600 with a sample standard deviation of $10,000.

1. If we want to determine a 99% confidence interval for the average yearly income, what is the value of t?
2. What wording in the prompt tells us to use t instead of z?
3. Develop a 99% confidence interval
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