Statistics

courses / SC/MATH1 151 6 - Introduction to Statistics I (Fall 202 1-2022) / General / TalDial (8). One large company studies their employee's commute time. A random sample of 9. commute times were selected. The sample mean is 48 mins, sample standard deviation s = 5 mins. Assume the commute time is normal. 1(4). Find 98% confidence interval for the true mean commute time. 2(4). Assume the population standard deviation is known to be o = 5.7, find the minimum sample size n such that the bound on the error of estimation of 99% confidence interval of the true mean commute time is 2.5. AY B E E E E O