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 was12 8hours (a) The sample standard deviation was not reported, but suppose that it was4hours 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 than12 6hours (Use a statistical computer package to calculate the P value Round your test statistic to two decimal places and your P valueto three decimal places ) t P value State the conclusion in the problem context Do not reject H 0 We do not have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12 6 hours Reject H 0 We have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12 6 hours Do not reject H 0 We have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12 6 hours Reject H 0 We do not have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12 6 hours (b) Now suppose that the sample standard deviation was3hours 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 than12 6hours (Use a statistical computer package to calculate the P value Round your test statistic to two decimal places and your P valueto three decimal places ) t P value

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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

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 was12.8hours.

(a)

The sample standard deviation was not reported, but suppose that it was4hours. 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 than12.6hours.(Use a statistical computer package to calculate theP-value.Round your test statistic to two decimal places and yourP-valueto three decimal places.)

t=P-value=

State the conclusion in the problem context.

Do not rejectH₀. We do not have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.6 hours.

RejectH₀. We have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.6 hours.

Do not rejectH₀. We have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.6 hours.

RejectH₀. We do not have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.6 hours.

(b)

Now suppose that the sample standard deviation was3hours. 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 than12.6hours.(Use a statistical computer package to calculate theP-value.Round your test statistic to two decimal places and yourP-valueto three decimal places.)

t=P-value=