Posted by **Anonymous** on Monday, November 7, 2011 at 1:41pm.

20. Calculate the range, variance, and standard deviation of the following data set:

5, 5, 6, 6, 6, 8, 8, 8, 8, 10, 10, 11, 12, 12, 20

(Points: 5)

Range = 15; Variance = 225; Standard Deviation = 7.5

Range = 3.85; Variance = 14; Standard Deviation = 3.74

Range = 20; Variance = 15; Standard Deviation = 4

Range = 15; Variance = 14.82; Standard Deviation = 3.85

- college math -
**kyle**, Monday, November 7, 2011 at 5:00pm
factor 6y^4+2y^3

- college math (Anon) -
**PsyDAG**, Tuesday, November 8, 2011 at 11:07am
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

Range = highest score - lowest

I'll let you do the calculations.

- college math (kyle) -
**PsyDAG**, Tuesday, November 8, 2011 at 11:09am
First, if you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.

2y^3(3y+1)

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