Question: Using the population formula, calculate the Mean, Variance, and Standard Deviation for the following grouped data. B. Amount of Telephone Bill 201 - 400 401
Using the population formula, calculate the Mean, Variance, and Standard Deviation for the following grouped data.

B. Amount of Telephone Bill 201 - 400 401 - 600 601 - 800 801 - 1000 1001 - 1200 Number of Families 8 13 17 9 3
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