Section iii: analysis and interpretation


1) The discord inflation rudiment for each shifting in a multiple return decomposition is listed beneath:



Age and all other X


Years of advice and all other X



College GPA and all other X




Given these VIFs what can you say environing multicollinearity in a pattern that includes all three of these shiftings?

2) In conducting a multiple straight return decomposition, an R2 appraise of 0.46 is obtained. An extra shifting is assumed and R2 improves to 0.52. The analyst conducting the return decomposition concludes that this is a averageingful growth in R2 and determines that the departure pattern is an delayhold pattern to be used. Is this judgment justified? (3 points)

3) In exploring the conformity among two shiftings, the subjoined strew batch is obtained. The analyst conducting the inquiry was hoping to do a straight return to assess the mark to which the straight pattern explains the conformity among the two shiftings. Given the strew batch beneath, should he live delay straight return? If so, why? If not, what other options can be used to assess this conformity?


4) An online retailer wanted to see if purchasing patterns were irrelative among courageous consumers and fecourageous consumers. Males were set to accept elapsed a average of $85 per month on online purchases, seeing feminines were set to accept elapsed a average of $78 per month. An stubborn samples t-experience was conducted to assess the observed dissimilitude among the two groups of consumers. A two-tailed experience was applied. The appraise of the t-Test Statistic for the observed dissimilitudes was -4.7, where the p-appraise is near than 0.0002. What misrecord can be made environing the observed dissimilitude?

5) The return equation  = 3,698 + 2,538X gives an R2 appraise of 0.2645. This averages that ________.

A) X and Y accept a very violent roll of correlation

B) the percentage of alteration in Y that is attributed to aimless rudiments is 26.45%

C) 26.45% of the alteration in Y can be explained by X

D) a one-percent substitute in Y earn carry to a 26.45% substitute in X




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