Question: LDS wants to be sure that the leak rate in
LDS wants to be sure that the leak rate (in cubic centimeters per second) of transmission oil coolers (TOCs) meets the established specification limits. A random sample 50 TOCs is tested, and the leak rates are recorded in the data file TOC. Estimate the variance in leak rate with a 95% confidence level (check normality).
Answer to relevant QuestionsA clinic offers a weight-loss program. A review of its records found the following amounts of weight loss, in pounds, for a random sample of 10 clients at the conclusion of the program: 18.2 25.9 6.3 11.8 15.4 20.3 16.8 ...A manufacturer bonds a plastic coating to a metal surface. A random sample of nine observations on the thickness of this coating is taken from a week's output, and the thicknesses (in millimeters) of these observations are ...An auditor, examining a total of 820 accounts receivable of a corporation, took a random sample of 60 of them. The sample mean was $127.43, and the sample standard deviation was $43.27. a. Using an unbiased estimation ...A class has 420 students. The final examination is optional-taking it can raise, but cannot lower, a student's grade. Of a random sample of 80 students, 31 indicated that they would take the final examination. Find a 90% ...Determine the sample size needed for each of the following situations. a. N = 3,300 σ = 500 1.96σx-bar = 50 b. N = 4,950 σ = 500 1.96σx-bar = 50 c. N = 5,000,000 σ = 500 1.96σx-bar = 50 d. Compare and comment on your ...
Post your question