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The data below represent the average number hours of sleep per night for a bunch of...

  1. The data below represent the average number hours of sleep per night for a bunch of adults. Compute the mean, mode, range, variance, standard deviation and standard error for the following data the long way showing ALL calculations as you go.

6, 6, 7, 7, 7, 8, 8, 9

(b) For some unknown reason, everyone in the group decided to sleep an extra hour a night. Without redoing all of the calculations, what will be the value of the five measures after the adjustment? Explain your reasoning.

Math   Statistics-And-Probability   
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