Calculate the standard deviation by hand of set of data

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1. Calculate the standard deviation by hand of the following set of data. You must show all work to receive credit. Round to 2 decimal places.

75, 80, 65, 90, 85

2. Using the below frequency table calculate an estimated mean. Show all work

Grade Frequency

70-74 1

75-79 3

80-84 5

85-89 7

Reference no: EM132054917

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