Question: Find the variance and standard deviation for the following frequency distribution of hours studied during a particular week by the 40 students in a statistics

Find the variance and standard deviation for the following frequency distribution of hours studied during a particular week by the 40 students in a statistics course:

X 10 9 8 7 6 5 f 1 0 2 4

X 10 9 8 7 6 5 f 1 0 2 4 7 11 X 4 3 2 1 0 f 53 4 2 N = 40

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