Question

Study testing the hypothesis population mean, when the population standard deviation is unknown ((Students` t distribution) and solve this question

Sunnytex ltd has a mean number of certain brands to be 8. `In conducting the concern, the boss demanded for the sample of some brands supplied per week. The number were 5,10, 15,20,25,30,35,40,45,50. At the 0.05% level of significance, is there any evidence that the number of certain brands supplied has weekly has decrease? 

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Answer 1

Answer:

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