Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Transcribed Image Text:Suppose we have a response variable Y and an explanatory factor x. which has four levels. We ran
the following code in R:
mymodel <- 1m(Y X)
Which of the following statements is FALSE.
O mymodel has four regression coefficients.
O The t value column of summary(mymodel) gives the t-statistic to test the null hypothesis that the true value of
the regression coefficient is zero.
O The value of the fourth regression coefficient in the summary(mymodel) output is the estimated difference
between the expected values of Y at level 4 and level 3 of X.
O The Pr(>|t|) values in summary(mymodel) are the p-values for the null hypothesis that the true value of the
regression coefficient is zero.
O By default, the estimated value of the intercept is the fitted value for the first level of X.
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