A researcher polled a sample of 1087 adults in the year 2010 , asking them how many hours per week they spent on the Internet. The sample mean was 10.49 with a standard deviation of 14.21 . A second sample of 1046 adults was taken in the year 2012 . For this sample, the mean was 9.45 with a standard deviation of 13.89 . Assume these are simple random samples from populations of adults. Can you conclude that the mean number of hours per week spent on the Internet differs between 2010 and 2012 ? Let μ1 denote the mean number of hours spent on the Internet in 2010 . Use the =α0.10 level and the P -value method with the TI-84 calculator.

A researcher polled a sample of 1087 adults in the year 2010 , asking them how many hours per week they spent on the Internet. The sample mean was 10.49 with a standard deviation of 14.21 . A second sample of 1046 adults was taken in the year 2012 . For this sample, the mean was 9.45 with a standard deviation of 13.89 . Assume these are simple random samples from populations of adults. Can you conclude that the mean number of hours per week spent on the Internet differs between 2010 and 2012 ? Let μ1 denote the mean number of hours spent on the Internet in 2010 . Use the =α0.10 level and the P -value method with the TI-84 calculator.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 26PFA

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Question

A researcher polled a sample of

1087

adults in the year

2010

, asking them how many hours per week they spent on the Internet. The sample mean was

10.49

with a standard deviation of

14.21

. A second sample of

1046

adults was taken in the year

2012

. For this sample, the mean was

9.45

with a standard deviation of

13.89

. Assume these are simple random samples from populations of adults. Can you conclude that the mean number of hours per week spent on the Internet differs between

2010

and

2012

? Let

μ1

denote the mean number of hours spent on the Internet in

2010

. Use the

=α0.10

level and the

-value method with the TI-84 calculator.

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