Introduction to Statistical Inference Quiz 7 Name : Leynab Alamsed ID Confidence level |90% 95% 99% Critical value z* 1.645 1.960 2.576 1. The time (in number of days) until maturity of a certain variety of tomato plant is Normally distributed with mean u and standard deviation o = 2.4. I select a simple random sample of four plants of this variety and measure the time until maturity. The four times, in days, are 63, 69, 62, 66. (a) Based on these data, construct a 95% confidence interval for u, in days. (b) If we instead wanted a 95% confidence interval with a margin of error of no more than 1 day, how large would the sample size need to be