Friday

August 22, 2014

August 22, 2014

Posted by **kesha** on Thursday, June 21, 2012 at 6:02pm.

Class

Frequency

61-63

19

64-66

17

67-69

5

70-72

10

73-75

12

- Statics -
**PsyDAG**, Friday, June 22, 2012 at 1:19pmUse the midpoint of the intervals to determine values.

Find the mean first = sum of scores/number of scores

Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

Standard deviation = square root of variance

I'll let you do the calculations.

**Related Questions**

Please tell me if i did this correct - Given the following frequency ...

Stats - Given the following frequency distribution, find the mean, variance, and...

Stats.....plz help me..... - Given the following frequency distribution, find ...

Math - Given the following frequency distribution, find the mean, variance, and ...

Math - Given the following frequency distribution, find the mean, variance, and ...

statistics - the following data represents the percentages of family income ...

statistics/mean and standard deviation - find the mean and standard deviation in...

math - Using the data in the table, calculate the mean, range, variance, and ...

math - Using the data in the table, calculate the mean, range, variance, and ...

math - Using the data in the table, calculate the mean, range, variance, and ...