Assignment-4 (Chs. 10, 12 and 13 : these chapters are marked different in the 7th ed. Chs 12 and 13 of the 6th ed are marked as Chs 13 and 14 in the 7th ed) Due by Midnight of Sunday, June 29th, 2014 (Dropbox 4): Total 125 points
True/False (two points each)
Chapter10
1. In an experiment involving matched pairs, a sample of 15 pairs of observations is collected. The degree of freedom for the t statistic is 14. true
2. In testing the difference between two means from two independent populations, the sample sizes do not have to be equal to be able to use the Z statistic. true
3. In testing the difference between the means of two independent populations, if neither population is normally distributed, then the sampling distribution of the
A manufacturing company produces part 2205 for the aerospace industry. This particular part can be manufactured using 3 different production processes. The management wants to know if the quality of the units of part 2205 is the same for all three processes. The production supervisor obtained the following data: The Process 1 had 29 defective units in 240 items; Process 2 produced 12 defective units in 180 items and Process 3 manufactured 9 defective units in 150 items. At a significance level of .05, the management wants to perform a hypothesis test to determine whether the quality of items produced appears to be independent of the production process used. What is the rejection point condition?
A. Reject H0 if 2 > 0.10257
B. Reject H0 if 2 > 9.3484
C. Reject H0 if 2 > 5.99147
D. Reject H0 if 2 > 7.37776
E. Reject H0 if 2 > 7.81473

8. A manufacturing company produces part 2205 for the aerospace industry. This particular part can be manufactured using 3 different production processes. The management wants to know if the quality of the units of part 2205 is the same for all three processes. The production supervisor obtained the following data: The Process 1 had 29 defective units in 240 items; Process 2 produced 12 defective units in 180 items and Process 3 manufactured 9 defective units in 150 items. At a significance level of .05, the management wants to perform a hypothesis test to determine whether