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susan athena. Given the following...

susan athena. Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work.

Class

Frequency

56-58

25

59-61

21

62-64

8

65-67

13

68-70

21

Class

Frequency

56-58

25

59-61

21

62-64

8

65-67

13

68-70

21

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