Question: 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 (Ipos Reid August 9 2005). The mean of the 1000 resulting observations was 12.7 hours and standard deviation 5 hours. A) Carry out a hypotheses test with significance of 0.05 to decide if there is a convincing evidence that the mean time spend using the internet by Canadian is greater than 12.5 hours. B) Now suppose that the sample standard deviation was 2 hours. Carry out the hypotheses test with a significance level of 0.05 to decide if there is convincing evidence that the mean time spent using Internet by Canadians is greater than 12.5 hours. C) Explain the decision in the above two and compare.