For all questions, Il and alternative hypothesis. » Calculate the test statistic

Question

For all questions, Il and alternative hypothesis. » Calculate the test statistic Find the p-value for the test statistic or the critical value. Use 5% significance level for testing the null hypothesis. Write a conclusion in context of the problem. · ger of a large shopping nm spend, on average, 85 minutes in the mall on any one occasion. To test this belief, the manager commissioned a study, which found that, from a random sample of 132 visitors to the mall, the average visiting time was 80.5 minutes. Assume a population standard deviation of 25 minutes and that visiting time is approximately normally distributed

Explanation / Answer

Null hypothesis

Mean = 85 ; Alternative hypothesis Men <=85

test stastic = (85-80.5)/(25/sqrt(132) )= 2.068

The P-Value is 0.01932. for one-tailed test from normal tables.

The result is significant at p < 0.05.

Null hypothesis can be rejected. Mean time is not equal to 85 minutes.

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