What is the sample mean for the data?

 Jun 3, 2018

The first table shows the number of hours of sleep of the population. The second table only shows a subset of this information, which would also be known as the sample. 


The mean is also known as the average. Find the sum of the values in the table and divide by the number of data values given. 


\(\overline{x}=\frac{8+8+8.5+8+9+8+9+9+8.5+8}{10}=\frac{84}{10}=8.4\text{ hours of sleep}\)

 Jun 3, 2018

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