(b) Now suppose that the sample standard deviation was 3 hours. Carry out a hypothesis test with a significance level of 0.05 to decide if there is convincing evidence that the mean time spent using...

Extracted text: (b) Now suppose that the sample standard deviation was 3 hours. Carry out a hypothesis test with a significance level of 0.05 to decide if there is convincing evidence that the mean time spent using the Internet by Canadians is greater than 12.4 hours. (Use a statistical computer package to calculate the P-value. Round your test statistic to two decimal places and your P-value to three decimal places.) t = P-value = State the conclusion in the problem context. Do not reject Ho. We do not have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.4 hours. Reject Ho. We have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.4 hours. Reject Ho. We do not have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.4 hours. Do not reject Ho. We have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.4 hours.


Extracted text: In a study of computer use, 1000 randomly selected Canadian Internet users were asked how much time they spend using the Internet in a typical week. The mean of the sample observations was 12.6 hours.