MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Question
Do the given data provide convincing evidence that the mean number of hours per day spent using electronic media was greater in 2009 than in 1999? Test the relevant hypotheses using a significance level of 0.01. (Use ?2009 − ?1999.)
Find the test statistic. (Round your answer to two decimal places.)
t =
Find the df. (Round your answer down to the nearest whole number.)
df =
Use technology to find the P-value. (Round your answer to four decimal places.)
P-value =
Construct and interpret a 98% confidence interval estimate of the difference between the mean number of hours per day spent using electronic media in 2009 and 1999. (Use ?2009 − ?1999. Round your answers to three decimal places.)
(______,____)hours
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