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Unformatted text preview: (e) Use PROC UNIVARIATE to get a summary for all the numerical variables for all the applicants; Making use of summary statistics and QQPLOT to state whether the three variables ( GPA , TOEFL, GRE ) are normally distributed. 2. Consider a data set q7: (a) Replace the missing values of X1 and X2 by the means; (b) Replace the missing values of X1 and X2 by the means for each level of GROUP, i.e. use the group mean instead of the overall mean. (c) It is known that the value of X5 depends on the value of X3 and X4 where Log(X5) = X3+0.1X4. Replace the missing values of X5 by the above formula. When X3 or X4 are missing, use the means of X3 and X4 instead. (d) It is known that the value of X6 depends on X7 where X6=u(i)+exp(X7-a(i)), u(i) is the mean of X6 at the i-th level of GROUP, and a(i) is the mean of X7 at the i-th level of GROUP Replace the missing values of X6 by the above formula....
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- Spring '11