Week 5 Knowledge Check Homework Practice Questions

Select the correct answer for the blank: If everything else stays the same, the required 1.0/ 1.0 Points sample size as the confidence level decreases to reach the same margin of error. Answer: • A. Increases • B. Decreases • C. Remains the same Answer Key: B Question 2 of 20 Suppose a marketing company wants to determine the current proportion of customers 1.0/ 1.0 Points who click on ads on their smartphones. It was estimated that the current proportion of customers who click on ads on their smartphones is 0.68. How many customers should the company survey in order to be 97% confident that the margin of error is 0.29 for the confidence interval of true proportion of customers who click on ads on their smartphones? Answer: (Round up your answer to nearest whole number) 13 Answer Key: 13 Feedback: Z-Critical Value = NORM.S.INV(.985) = 2.17009