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December 22, 2014

December 22, 2014

Posted by **Jennifer** on Thursday, January 24, 2008 at 8:17pm.

Mean = 78 Midrange = 72 Third quartile = 94 Mode = 84

Median = 80 Standard deviation = 11 Range = 52 First quartile=68

What score was earned by more students than any other score? Why?

How many students scored between 68 and 94 on the exam?

What was the highest score earned on the exam?

What was the lowest score earned on the exam?

- statistics -
**Damon**, Thursday, January 24, 2008 at 8:57pmThe mode is the most popular grade = 84

68 is the median of the first half

so 25 were between 68 and the median

another 25 were between the median and 94

so

50 students between first quartile 68 and third quartile 94

Mid range is 72.

That is half way between lowest and highest. Range = 52 so high = 72 +52/2 and low = 72 -52/2

so

low = 46

high = 98

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