a. What is the sign of Skewness and the minimum value of Kur…

a. What is the sign of Skewness and the minimum value of Kurtosis for the following density function with a normal fit?     b. The STATA results are given below for the Skewness and Kurtosis tests for normality for the above density function. Interpret the results. Do you reject the null hypothesis?         Joint test Variable Obs. Pr(skewness) Pr(kurtosis) Adj chi2(2) Prob>Chi2 birthweight 3,000 0.0000 0.0000 358.77 0.0000

Using birthweight (in grams) -alcohol data, the following ar…

Using birthweight (in grams) -alcohol data, the following are the Wilcoxon Rank-Sum (Mann-Whitney) Test results. Interpret the results. (Note: D =1 if mother drank alcohol during pregnancy) Alcohol Obs. Rank sum Expected 0 2942 4426087 4414471 1 58 75413 87029 Combined 3000 4501500 4501500 Unadjusted variance 42673220   Adjustment for ties -6872.7978   Adjusted variance 42666347                       Z = 1.778 Prob > |z| = 0.0753