The table shows the number of hours of sleep all members of a theater group got the night before their musical.
8 8.5 8 7.5 9 9
8 7 7 9 8 8
8 7 7 8 7.5 8.5
7.5 8 8.5 9 8 7.5
For their next musical, only 10 members were asked how many hours of sleep they got the night before. Their responses are recorded in the table.
8 8 8.5 8 9
8 9 9 8.5 8
What are the population and sample means from the tables?
Enter your answers in the boxes.
Round to the nearest tenth.

Question

The table shows the number of hours of sleep all members of a theater group got the night before their musical.
8 8.5 8 7.5 9 9
8 7 7 9 8 8
8 7 7 8 7.5 8.5
7.5 8 8.5 9 8 7.5
For their next musical, only 10 members were asked how many hours of sleep they got the night before. Their responses are recorded in the table.
8 8 8.5 8 9
8 9 9 8.5 8
What are the population and sample means from the tables?
Enter your answers in the boxes.
Round to the nearest tenth.

mhchen · Answer

Since population is the entire group you're representing, it will be the average of the first set of data points.
The sample would be the people who responded that represents the population, so that would be the second set of data points.

The average (or mean) is calculated by adding all the points up, and dividing it by the total number of data points you have.