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A set of 50 data values has a mean of 15 and a variance of

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Reference no: EM13586832

A set of 50 data values has a mean of 15 and a variance of 25.  Find the standard score of a data value = 30.

Following are the American College Test (ACT) scores attained by the 25 members of a local high school graduating class:

21

24

23

17

31

19

19

20

19

25

17

23

16

21

20

28

25

25

21

14

19

17

18

28

20

 

Find P99, P90, and P80 for the ACT scores. [Hint:  Use nk/100 to find the location in the ordered data for each percentile.]

Reference no: EM13586832

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