If a hypothesis is rejected at the 0.025 level of significance, it:
a. must be rejected at any level.
b. must be rejected at the 0.01 level.
c. must not be rejected at the 0.01 level.
d. may or may not be rejected at the 0.01 level.
Q. 2Stepwise regression is an iterative procedure that:
a. adds one independent variable at a time.
b. deletes one independent variable at a time.
c. Either a or b.
d. Both a and b.
Q. 3In testing the hypotheses H0: = 800 vs. H1: 800, if the value of the test statistic equals 1.75, then the p-value is:
a. 0.0401
b. 0.0802
c. 0.4599
d. 0.9599
Q. 4In a stepwise regression procedure, if two independent variables are highly correlated, then:
a. neither variable will enter the equation.
b. both variables will enter the equation
c. only one variable will enter the equation.
d. not enough information is given to answer this question.
Q. 5For a two-tail test, the null hypothesis will be rejected at the 0.05 level of significance if the value of the standardized test statistic z is:
a. smaller than 1.96 or greater than -1.96
b. greater than -1.96 or smaller than 1.96
c. smaller than -1.96 or greater than 1.96
d. greater than 1.645 or less than -1.645
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