(Answered) Calculate the sample standard deviation and sample variance

Engineering

Calculate the sample standard deviation and sample variance for the following frequency distribution of final exam scores in a statistics class. If necessary, round to one more decimal place than the largest number of decimal places given in the data.

Lower Bound--Upper Bound--Frequency

56--64--11

65--73--15

74--82--14

83--91--4

92--100--11

sample standard deviation?

sample variance?

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