(Problem Set #7) In the past, the mean age of consumers of a product was 38 years. Recently the product has been drastically changed. In order to determine whether there has been a change in the mean age of the product consumers, a sample of 16 consumers is selected. The mean age in the sample is 33 years and the standard deviation in the sample is 10 years. Let u = the mean age of the current product consumers. At a 1% significance level, the null hypothesis is rejected if Oa. 12 2.947 Ob t| 2 2.131 OC121.789 't<1.965

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(Problem Set #7)
In the past, the mean age of consumers of a product was 38 years. Recently the product has been drastically
changed. In order to determine whether there has been a change in the mean age of the product consumers, a
sample of 16 consumers is selected. The mean age in the sample is 33 years and the standard deviation in the
sample is 10 years. Let u = the mean age of the current product consumers.
At a 1% significance level, the null hypothesis is rejected if
O a.
띠> 2.947
"[디> 2.131
O c.
"t> 1.789
Od.
t<1.965
Transcribed Image Text:(Problem Set #7) In the past, the mean age of consumers of a product was 38 years. Recently the product has been drastically changed. In order to determine whether there has been a change in the mean age of the product consumers, a sample of 16 consumers is selected. The mean age in the sample is 33 years and the standard deviation in the sample is 10 years. Let u = the mean age of the current product consumers. At a 1% significance level, the null hypothesis is rejected if O a. 띠> 2.947 "[디> 2.131 O c. "t> 1.789 Od. t<1.965
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