Managerial statistics

Chapter 11 1. Assume that the following samples are taken form two populations Sample 1 Sample 2 n1 = 50 n2 = 35 Mean X1= 13.6 Mean X2=11.6 01 = 2.2 62 = 3.0 Required a. What is the point estimate of the difference between the two population means? b. Provide a 90% confidence interval for the difference between the two population mean c. Provide a 95% confidence interval for the difference between the two population means 2. Find the following F distribution values a. Fo.os with degree of freedom 5 and 10 b. Fo.10 with degrees of freedom 10 and 20 3. A sample of 16 items from population 1 has a sample variance s? = 5.8 and a sample of 21 from population 2 has a sample variance s2 =2.4. Test the following hypotheses at the 0.05 level of significance. H,: 0 > 0 ; Required a. What is your conclusion using the p-value? b. Repeat the test using the critical value approach. What is your conclusion