Stat5601Midterm2_10_31_10_Solved

Stat5601Midterm2_10_31_10_Solved - Midterm 2 STAT 5601 Fall...

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Unformatted text preview: Midterm 2 STAT 5601 Fall 2010 This paper contains 40 points. Show the details of your calculations for full credit. Name: SID: In the following, interpret the questions in terms of R commands. 1. State in 1 short paragraph what the following function does. [8 points] TestOutputs=function(X, NHV,AH,CI.Level){ TTest.Data=t.test(X, mu=NHV,alternative=AH,conf.level=CI.Level) T.O=TTest.Data$statistic SR.O=wilcox.test(X, mu=NHV,alternative=AH)$statistic Sign.O=sum(X>NHV) return(list(T=T.O, SR=SR.O, S=Sign.O)) } Answer: This is a R function. It takes in the data as X , and a constant as NHV , the nature of the alternative hypothesis is speci- 1 fied in AH , and the desired level of confidence for the interval esti- mate is given in CI.Level . The test statistics from the t-test , the wilcoxon signed rank test and the sign test are computed, and returned as a list. 2. Now consider the following lines of R code. Describe in 1 sentence for each item what the relevant bit of R code is implementing.code is implementing....
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Stat5601Midterm2_10_31_10_Solved - Midterm 2 STAT 5601 Fall...

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