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In a random sample...

In a random sample of six microwave ovens, the mean repair cost was $85.00 and the standard deviation was $11.00. Assume the population is normally distributed and use a t-distribution to construct a 90% confidence interval for the population mean mu. What is the margin of error of mu? Interpret the results.

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Construct a frequency distribution for the given data set using 6 classes. In the table, include the midpoints, relative frequencies, and cumulative frequencies. Which class has the greatest frequency and which has the least frequency?

Amount (in dollars) spent on books for a semester

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304

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518

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165

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267

505

299

438

86

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40

135

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491

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65

435

49

126

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474

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