In a September 2013 poll conducted by the Pew Research Center, they asked a random sample of

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In a September 2013 poll conducted by the Pew Research Center, they asked a random sample of U.S. adults if they owned a cellphone. The results are shown in the following table by race.

White Black Hispanic Total 3,801 Own a cellphone? 614 5,026 Yes 611 53 422 543 68 68 No Total 5,569 4,223 682 664


a. What proportion in each race category owns a cellphone?
b. Does there seem to be an association between race and whether or not someone owns a cellphone?
c. Write out the null and alternative hypotheses for this study.
d. The table for these results can be found in the file Cellphone Race. Put that table in the Multiple Proportions applet (make sure you click on Use Table). What is the value of the MAD statistic?
e. Do at least 1,000 repetitions and find a p-value.
f. Based on your p-value, do you have strong evidence that there is an association between race and whether or not someone owns a cellphone?

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Introduction To Statistical Investigations

ISBN: 9781118172148

1st Edition

Authors: Beth L.Chance, George W.Cobb, Allan J.Rossman Nathan Tintle, Todd Swanson Soma Roy

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