Distribution of grades of a sample of statistics, Basic Statistics

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Distribution of grades of a sample of statistics

The following is a frequency distribution of grades of a sample of statistics examinations.

Grade Frequency

50 - 59 7
60 - 69 10
70 - 79 22
80 - 89 15
90 - 99 6

Compute the following measures:

a. The mean
b. The variance
c. The standard deviation
d. The coefficient of variation

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Basic Statistics: Distribution of grades of a sample of statistics

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Basic Statistics: Distribution of grades of a sample of statistics

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