You conduct a survey of 100 randomly chosen Berkeley students, asking each one h

Question

You conduct a survey of 100 randomly chosen Berkeley students, asking each one how often they get their hair cut. You conduct a two-tailed test using the standard value of with the null hypothesis that the mean time between haircuts in the population is 4 weeks. In which circumstance can you reject the null hypothesis? Select one: a. A 95% confidence interval for the mean does not include 4 weeks. b. You calculate a t-statistic of 1.769, which lies at the 0.96 quantile of the t-distribution with 99 degrees of freedom. c. You get a p-value of 0.09 d. You should reject the null for all of the above.

Explanation / Answer

here optin A is correct;a s all other have p value more than 0.05.

a. A 95% confidence interval for the mean does not include 4 weeks.

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