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In a study of computer use, 1000 randomly selected Canadian Internet users were asked how much...

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Question

Statistics

In a study of computer use, 1000 randomly selected CanadianInternet users were asked how much time they spend using theInternet in a typical week. The mean of the sample observations was12.6 hours.

(a)

The sample standard deviation was not reported, but suppose thatit was 4 hours. Carry out a hypothesis test with a significancelevel of 0.05 to decide if there is convincing evidence that themean time spent using the Internet by Canadians is greater than12.4 hours. (Use a statistical computer package to calculate theP-value. Round your test statistic to two decimal placesand your P-value to three decimal places.)

t= 1.58

P-value= .057

State the conclusion in the problem context.

Do not reject H0. We do not have convincingevidence that the mean weekly time spent using the Internet byCanadians is greater than 12.4 hours.

Now suppose that the sample standard deviation was 3 hours.Carry out a hypothesis test with a significance level of 0.05 todecide if there is convincing evidence that the mean time spentusing the Internet by Canadians is greater than 12.4 hours. (Use astatistical computer package to calculate the P-value.Round your test statistic to two decimal places and yourP-value to three decimal places.)

t=

P-value=

Answer & Explanation Solved by verified expert
4.1 Ratings (778 Votes)
Ans a 0 using exceladdinphstatone sample test we have t Test for Hypothesis of the Mean Data Null Hypothesis m 124 Level of Significance 005 Sample Size 1000 Sample Mean 126 Sample Standard Deviation 4    See Answer
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