Question: Find the standard deviation for the indicated sets of numbers. A calculator may be used. The X-ray dosages in Exercise 25 Data from Exercises 25

Find the standard deviation for the indicated sets of numbers. A calculator may be used.

The X-ray dosages in Exercise 25


Data from Exercises 25

The dosage (in mR) given by a particular X-ray machine was measured 20 times, with the following readings:

4.25, 4.36, 3.96, 4.21, 4.44, 3.83, 4.37, 4.27, 4.33, 4.34, 4.15, 3.90,


Using the class limits 3.80, 3.90, 4.00, . . . , 4.60, construct a frequency histogram of these data.

4.25, 4.36, 3.96, 4.21, 4.44, 3.83, 4.37, 4.27, 4.33, 4.34, 4.15, 3.90, 4.41, 4.51, 4.18, 4.26, 4.29, 4.09, 4.36, 4.23

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