Stat 330 Lab 8 you must fill in the blanks below. Your Name (please print) Semester/year Your lab time Using your calculator do the following problems. This lab sheet will help you in working on your project phase two. 1. Find and interpret a 95% confidence interval for a population mean u for these values: a. b. 2. Independent random samples of size were selected from each of two populations. The mean and standard deviations for the two samples were and . a. Construct a 90% confidence interval for each mean. b. What values are unlikely for each mean? 3. The following observations are a sample from a normal population: 7.4 7.1 6.5 7.5 7.6 6.3 6.9 7.7 6.5 7.0 a. Find the mean and standard deviation of these data. b. Find a 99% confidence interval for the population mean u. Interpret this interval. Problem 3 can also be done in JMP Put your data in column 1 Then go up to analyze and down to distributions drag this column over to y, columns Click ok Then on the red arrows by the heading column 1 choose confidence interval and then your confidence level. 4. Independent random samples of and observations were selected from two normal populations with equal variances: Population 1 2 Sample Size 16 13 Sample Mean 34.6 32.2 Sample Variance 4.8 5.9 Find a 99% confidence interval for each mean