In simple linear regression, the fit of the regression equation to the data is improved as error sum of squares increases and regression sum of squares decreases.
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Q. 2In all the rank tests, normality is not a required assumption for the underlying populations.
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Q. 3Data that are ordered have a specified measure of the distance between observations but have no natural zero are called ________ data.
A) ratio
B) ordinal
C) nominal
D) interval
Q. 4The sampling distribution of sample means is normal for samples of any size, n, provided that the parent sampled population has a normal distribution.
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Q. 5Which of the following is expected to occur in multiple regression analysis if an important variable is omitted from the list of independent variables?
A) It will lead to unbiased least squares estimators.
B) It will lead to biased least squares estimators.
C) It will lead to biased estimators of the variance.
D) It will lead to multicollinearity between predictor variables.
Q. 6The first-order autoregressive model expresses the current value, xt of a series in terms of the previous value, xt-1 and a nonautocorrelated random variable t.
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Q. 7The alternative hypothesis is denoted by ________.
A) HN
B) H0
C) H1
D) HAl
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