The heights (in cm) for a random sample of 60 males were measured. The sample mean is 166.55, the standard deviation is 12.57, the sample kurtosis is 0.12, and the sample skewness is ?0.23. The following table shows the heights subdivided into non-overlapping intervals.ClassObservedExpected piHeight < 150100.09150 ? Height < 16060.21160 ? Height < 170180.31170 ? Height < 180170.25Height ? 18090.14The heights are subdivided into five intervals. The degrees of freedom for the goodness-of-fit test for normality is ________.
A. 3
B. 4
C. 5
D. 2
Answer: D
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