In analyzing the consumption of cottage cheese by members of various occupational groups, the United Dairy Industry Association found that 326 of 837 professionals seldom or never ate cottage cheese, versus 220 of 489 white- collar workers and 522 of 1243 blue-collar workers. Assuming independent samples use the 0.05 level in testing the null hypothesis that the population proportions could be the same for the three occupational groups.
Answer to relevant QuestionsThe movie complex at a shopping mall shows three movies simultaneously on the same evening. On a recent Friday evening, each movie drew a capacity crowd. A sample of the evening’s movie patrons have been coded according to ...A pharmaceutical company has specified that the variation in the quantity of active ingredient in its leading prescription medication must be such that the population standard deviation must be no more than 1.20 micrograms. ...In past studies, a fast-food franchise has found the standard deviation of weights for quarter-pound hamburgers to be approximately 0.28 ounces after cooking. A consultant has suggested a new procedure for hamburger ...For df = 8 and the constant A, identify the value of A such that a. P(x2 > A) = 0.90 b. P(x2 > A) = 0.10 c. P(x2 > A) = 0.95 d. P(x2 > A) = 0.05 e. P(x2 < A) = 0.975 f. P(x2 < A) = 0.025 Over the past year, an audio store has sold stereo systems produced by three different manufacturers. Of the 400 units from company A, 12% were returned for service during the warranty period. This compares to 15% of 300 ...
Post your question