Refer to the frequency distribution and find the standard deviation by using the formula Blood Platelet Count of Males (1000 cells/µL) Frequency 0-99 2 s = ,where x 100-199 43 n(n - 1) represents the class midpoint, f represents the class frequency, and n represents the total number of sample values. Compare this value with the standard deviation found using the original list of data values, 63.4. 200-299 78 300-399 19 400-499 500-599 1 600-699 s= (1000 cells/uL) %3D

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