Wednesday

July 23, 2014

July 23, 2014

Posted by **Debin** on Tuesday, December 4, 2012 at 5:23am.

Test score

90

80

70

60

50

Frequency

1

4

11

6

2

Find the standard deviation (rounded to the nearest hundredth).

- Math -
**PsyDAG**, Tuesday, December 4, 2012 at 10:01amFind 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**

Math - Consider the following test scores obtained by a class. Test score 90 80 ...

ALGBRA - Consider the following test scores obtained by a class. Test score 90 ...

statistics - a math test has a mean of 43 and a standard deviation of 17.0. find...

statistics - a math test has a mean of 43 and a standard deviation of 17.0. find...

college, statistics - a math test has a mean of 43 and a standard deviation 0f ...

Stats - A Math test has a mean of 51 and standard deviation of 5.0. Find the ...

math - Statistics: Analyze student exam scores Students were given an exam with ...

statistics - the admissions policy at a certain university requires that ...

statistics - the admissions policy at a certain university requires that ...

math - Students were given an exam with 300 multiple-choice questions. The ...