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The following table shows the distribution of the number of hours worked each week for a sample of 100 community college students. Hours per week

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The following table shows the distribution of the number of hours worked each week for a sample of 100 community college students. Hours per week Number of Students 0-under 10 24 10-under 20 14 20-under 30 39 30-under 40 23 4. What is the sample mean? A 25.0 B 15.2 C 21.1 D 17.6 5. What is the sample standard deviation? A 10.9 B 10.0 C 12.5 D 8.70

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