Exhibit 12.8 The heights (in cm)for a random sample of 60 male employees of S&M Construction Company were measured.The sample mean is 166.5,the standard deviation is 12.57,the sample kurtosis is 0.12,and the sample skewness is -0.23. Refer to Exhibit 12.8.The Jarque-Bera test statistic for normality is assumed to follow a χ² distribution with the following degrees of freedom: A)k - 1. B)2 C)k - 1 D)(r - 1)(c - 1)

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The Jarque-Bera test statistic for normality follows a chi-squared distribution with 2 degrees of freedom. This is a standard assumption in the Jarque-Bera test.