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dard Deviation, Varance, Z Scores 00:00 Theresa Laymon: Attempt 1 Question 9 (1 point) Approximate the sample variance given the following frequency distribution. 6 Class

dard Deviation, Varance, Z Scores 00:00 Theresa Laymon: Attempt 1 Question 9 (1 point) Approximate the sample variance given the following frequency distribution. 6 Class Frequency 10 10 - 19 17 9 20 - 29 12 30 - 39 14 40 - 49 11

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