The following values denote the number of customers handled by an optometrist during a random sample of four periods of one hour each: 4, 6, 2, and 5.
a. Find the standard deviation of these values.
______________
b. Find the range, R.
______________

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The Answer of The following values denote the number of customers handled by an optometrist during a random sample of four periods of one hour each: 4, 6, 2, and 5.
a. Find the standard deviation of these values.
______________
b. Find the range, R.
______________

The Following Values Denote the Number of Customers Handled by an Optometrist