Below are the data collected from two random samples of 500 American adults on the number of hours they work per day (rounded to the nearest hour):
Number of hours of work per day 6 7 8 9 10
Sample A: Number of adults 60 90 145 150 55
Sample B: Number of adults 70 80 140 145 65
Ryan concludes that adults spend a mean of 8 hours working each day. Malia thinks the mean is 9 hours. Who is correctâ€”Ryan or Malia? Explain your answer in two or three sentences.

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So what is:
6(60) + 7(90) + 8(145) + 9(150) + 10(55)

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