1.

A simple random sample of 700 elements generates a sample proportion 17 = 0.69. 3. Provide the 90% confidence interval for the population proportion (to 4 decimals). ( 0.6557 0, 0.7243 0 ) b.Provide the 99% confidence interval for the population proportion (to 4 decimals). ( 0.6450 $0 0.7350 9) Fewer young people are driving. In 1995, 63.9% of people under 20 years old who were eligible had a driver's license. Bloomberg reported that percentage had dropped to 41.7% in 2016. Suppose these results are based on a random sample of 1,200 people under 20 years old who were eligible to have a driver's license in 1995 and again in 2016. a. At 95% confidence, what is the margin of error and the interval estimate of the number of eligible people under 20 years old who had a driver's license in 1995? Margin of error = 0.0139 0 (to four decimal places) Interval estimate 2 0.6118 w to 0.6662 M (to four decimal places) b. At 95% confidence, what is the margin of error and the interval estimate of the number of eligible people under 20 years old who had a driver's license in 2016? Margin of error = 0.0279 9 (to four decimal places) Interval estimate 2 0.3891 Q0 to 0.4449 Q0 (to four decimal places) c. Is the margin of error the same in parts (a) and (b)? No vk'o Why, or why not? The margin of error is larger in part (b). This is because the sample proportion is closer to 0.5 in part (b) than in part (a). V M