Statistics & Probability

Problem 5 An oil company claims that. the sulfur content of its diesel fuel is at most .15 percent. To check this claim, the sulfur contents of 40 randomiy chosen samples were determined; the resulting sample mean and sample standard deviation were .162 and .040. (a) Calculate the pvalue needed to test whether the company's claim is vad. (h) Use part (a) to conclude the test at the 5 and 10 percent levels of signicance