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A study carried out by Nielsen/ Net Ratings in the last August 2001 indicated that the...

A study carried out by Nielsen/ Net Ratings in the last August 2001 indicated that the average number of Internet sessions at home per month was 34. In the following September, they conducted a study and recorded the number of Internet sessions at home for a random sample of 100 Internet users. The average number of Internet sessions was 32 with standard deviation equal to 4.5. Compute a statistical test to determine if the number of Internet sessions decreased from August to September? Show workings and interpret your answer in simple English.

a. Write down the test hypotheses, the test statistic and the p-value.

b. What conclusions can you draw?

Math   Statistics-And-Probability   
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