(Answered) The company collected a sample of the salaries of its

Engineering

The Company collected a sample of the salaries of its employees. There are 70 salary data points summarized in the frequency distribution below:

Salary Number of Employees

5,001-10,000 8

10,001-15,000 12

15,001-20,000 20

20,001-25,000 17

25,001-30,000 13

Find the standard deviation.

Find the variance.

Pretty confused on how this is solved. Maybe its because I haven't dealt with that many numbers

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