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 12.7 hours. (a) the sample standard deviation was not reported, but suppose that it was 5 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 12.5 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.)