need to find the median:

Group Frequency

0-4 2

5-9 3

10-14 7

15-19 5

20-24 3

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need to find the median:

Group Frequency

0-4 2

5-9 3

10-14 7

15-19 5

20-24 3

Group Frequency

0-4 2

5-9 3

10-14 7

15-19 5

20-24 3

- car.man
**Posts:**5**Joined:**Tue Mar 24, 2009 6:18 pm

There are 2+3+7+5+3=20 points, so the median is the average of the 10th & 11th. But you have classes, not the actual points, so you have to start at the bottom of the interval (10-14, probably 9.5). The 10th point is 5th (of 7) in the interval & the interval is 5 wide, so its 9.5+(5/7)(5).

- testing
**Posts:**21**Joined:**Sun Dec 07, 2008 12:26 am

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