The stepwise regression procedure begins by computing the multiple regression model for all independent variables of interest.
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Q. 2A sample is used to obtain a 95 confidence interval for the mean of a population. The confidence interval goes from 10.89 to 13.21 . If the same sample had been used to test H0: = 12 vs. H1: 12, H0 could not be rejected at the 0.05 level.
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Q. 3The stepwise regression procedure begins by computing the simple regression model for each independent variable.
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Q. 4For a given level of significance, if the sample size is increased, the probability of committing a Type I error will decrease.
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Q. 5Because indicator variables represent different groups, t-tests on the indicator variables allow us to draw inferences about the ____________________ in y between the groups.
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Q. 6A two-tail test for the population mean produces a test-statistic z = 1.89 . The p-value associated with the test is 0.0588.
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Q. 7In order to represent 3 categories of a nominal variable, we need to create _______________ indicator variables.
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Q. 8Using the confidence interval when conducting a two-tail test for the population mean , we do not reject the null hypothesis if the hypothesized value for falls between the lower and upper confidence limits.
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