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The table below shows the age distributionof a sample of persons from Community A who developed prostate cancer. What is the VARIANCE for the age

The table below shows the age distributionof a sample of persons from Community A who developed prostate cancer.

What is the VARIANCE for the age of persons from community A developing prostate cancer?

Age (years)

Frequency

Cumulative Frequency

51 - 60

2

2

61 - 70

9

11

71 - 80

6

17

81 - 90

7

24

a.

9.89

b.

97.83

c.

9.68

d.

93.75

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