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guiziao guiziao
  • 04-10-2017
  • Mathematics
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How many numbers in the data set are within 1 standard deviation of the mean?

a.13
b.14
c.15
d.16

How many numbers in the data set are within 1 standard deviation of the mean a13 b14 c15 d16 class=

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andriansp andriansp
  • 04-10-2017
The answer to this question would be: A.13

In this question, the mean is 20.2 and the standard deviation is 2.4. That means the range for of 1 standard deviation would be 20.2 +- 2.4= 17.8- 22.6
The number that included in that range would be 18-22. Then you just need to add them all

18  =2
19  =3
20 =4
21  =3
22 =1
The answer would be: 2+3+4+3+1 = 13
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