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# Use the following to answer the questions below:"Black Friday," which occurs annually the day ...

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Use the following to answer the questions below:

"Black Friday," which occurs annually the day after Thanksgiving, is one of the biggest shopping days of the year. During the holiday season, many stores created controversy by starting their mega-sales on Thanksgiving itself. In a random sample of 25 individuals who shopped during the Black Friday four-day weekend (Thursday - Sunday), the average amount spent was $399.40 with standard deviation$171.10. The data are displayed in the provided dotplot.

Suppose we know that in a random sample of n = 22 individuals who shopped over Black Friday weekend in 2011 the average amount spent was $381.30 with standard deviation$119.80. Recall that for the 2012 sample of 25 individuals, the average amount spent was $399.40 with standard deviation$171.10. Dotplots of both samples are provided.

Test, at the 5% level, if the samples provide evidence that Black Friday shoppers spent more, on average, in 2012 than they did in 2011. Include all of the details of the test.
Textbook

## Statistics: Unlocking the Power of Data

Edition: 3rd
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jchang19jchang19
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 Sign in or Sign up in seconds to unlock everything for free More solutions for this book are available here This verified answer contains over 1530 words.

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scigeekalic Author
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3 weeks ago
 Good timing, thanks!
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