Mean and variance based on frequency distribution

Mean and variance based on frequency distribution

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Reference no: EM1317628

Following sample data arranged in a frequency distribution table. Use Excel to compute the sample mean and variance from this data set.

Reading scores	Frequency

81	7
82	8
83	5
84	9
85	4
86	7
87	8
88	5
90	9
91	8

Reference no: EM1317628

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