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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

9.89

97.83

9.68

93.75

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