Suppose we are doing a study on the proportion of people whohave texted while driving. We will use a 90% confidence interval.We need to know what sample size to use before we do the study.What sample size should we use to guarantee that our MOE is 3% orsmaller? Round your answer up to the nearest whole number. Group ofanswer choices 752

Question 2 Suppose we are doing a study on the proportion ofpeople who have texted while driving. But this time we want to bemore accurate, so we use a 99% confidence interval. We need to knowwhat sample size to use before we do the study. What sample sizeshould we use to guarantee that our MOE is 3% or smaller? Roundyour answer up to the nearest whole number. Note: Your answershould be much larger than the previous answer. Hypothesis TestExample For Proportions: What proportion of people do not drinkalcohol? You believe that the proportion of people in the U.S.A.who do not drink is less than 15%. To determine if you are correct,you take a SRS of 400 U.S. residents, and find the proportion ofpeople who do not drink in your sample is 0.22. Conduct ahypothesis test at the 5% significance level.

Question 3 Write the hypotheses for the test.

Question 4 Check the assumptions for the test. There are twoassumptions you must test.

Question 5 What is the z-crit value? Round your answer to 2decimal places. Include the correct sign.

Question 6 Calculate the value of the test statistic z-calc.Round your answer to 2 decimal places.

Question 7 Do you reject or fail to reject the null? Reject HoFail to Reject Ho

Question 8 Write the conclusion. State the significance level inthe conclusion.

Question 9 Increasing sample size while holding the confidencelevel constant will increase the width of the confidence interval.True False

Question 10 Increasing the confidence level while holding thesample size constant will increase the width of a confidenceinterval. True False