General Question

chelle21689's avatar

How do I find the mean and standard deviation from a frequency table?

Asked by chelle21689 (5128 points ) March 13th, 2011

Class ............................ Frequency
18–25 .................. 12
26–33 ................. 18
34–41 .................. 2

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7 Answers

KateTheGreat's avatar

Do you have a graphing calculator?

blueiiznh's avatar

Is this homework?

chelle21689's avatar

This is a final exam review. REVIEW lol and yes I do have a graphing calculator. I know I’m supposed to enter data into a list but I don’t know the numbers..

chelle21689's avatar

But this problem doesn’t give out the numbers…just ranges.

Dr_Lawrence's avatar

Assume the numbers are at the midpoint of the ranges.

roundsquare's avatar

@Dr_Lawrence I guess thats the best you can do… but still feels sketchy.

Anyway, if you are doing that, you can covert the table to:

Class…......................... Frequency
21.5…............... 12
29.5….............. 18
37.5…............... 2

If you had 12 people who were 21.5 years old, 18 who were 29.5 years old and 2 who were 37.5 years old, what would you do? (Try from here, see if it helps).

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