Minitab Assignment Example | Topics and Well Written Essays - 250 words - 1

Minitab - Assignment ExampleTo determine whether the choice of words of the cover earn influences the response rate, three different cover letters were used in a survey of students at a Midwestern university. Suppose that each of the three cover letters accompany questionnaires sent to an equal number of ergodicly selected students. Returned questionnaires were then classified according to the type of cover letter (I, II, or III). Use the accompanying data to test the hypothesis that the true proportions of in all returned questionnaires tended to(p) by cover letters I, II, and III are the same. Use a 0.05 significance level.As shown in Minitab output, all expected frequencies are greater than 1 and no expected frequency is less than 5. Furthermore, as give tongue to in the problem, the take in is a simple random sample. Therefore, all the assumptions of the test are met.At the 5% significance level, the data permit sufficient evidence to conclude that the hypothesis that th e true proportions of all returned questionnaires accompanied by cover letters I, II, and III are the same.2. A survey was conducted in the San Francisco Bay subject in which each participating individual was classified according to the type of vehicle used close often and city of residence. A subset of the resulting data is given in the accompanying table. Do the data provide convincing evidence of an association between city of residence and vehicle type? Use a significance level of 0.05. You may assume that it is reasonable to regard the sample as a random sample of Bay area residents.As shown in Minitab output, all expected frequencies are greater than 1 and no expected frequency is less than 5. Furthermore, as stated in the problem, it is reasonable to regard the sample as a random sample of Bay area residents. Therefore, all the assumptions of the test are met. standardise residuals greater than 2 in absolute value provide evidence