Question

All 150 eighth grade students at a local middle school were asked how many hours they studied during the week. Each row of the table represents one sample from the population. Find the mean of each sample.

Population Data
Row 1
6
5
3
0
4
Row 2
4
5
3
5
6
Row 3
7
1
4
5
3
Row 4
4
2
5
6
3


Which row has the greatest mean?

Answer 1

Row 2

Explanation:

To find the mean, we add all the numbers and divide by the number of numbers

Row 1:

(6+5+3+0+4)/5 = 18/5 = 3.6

Row 2:

(4+5+3+5+6)/5 = 23/5 = 4.6

Row 3:

(7+1+4+5+3)/5 = 20/5 = 4.0

Row 4:

(4+2+5+6+3)/5 = 20/5 = 4.0

The greatest mean , or the largest mean is 4.6 or Row 2