The independent variable(s) that is/are significant at a 5% significance level i

Question

The independent variable(s) that is/are significant at a 5% significance level is/are. a. Advertisement Expresses b. Sales c. Salaries Paid d. all of the above e. only (b) and (c) of the above If you are to use the critical value approach to a hypothesis testing of a regression coefficient, the appropriate test statistic to be used is the ___ statistic. a. Z b. t c. F d. e. either t or F If you are to find the appropriate degrees of freedom for significance testing of each of the 3 independent variable and an intercept with 20 data points a. 20 b. 19 c. 17 d. 16 e. none of the above If you are to conduct a significance testing of a regression coefficient via the critical value approach, the (critical0 table value at a 5% significance level will be a. 2.0930 b. 1.72941 c. 2.1199 d. 1.7459 e. 1.96 The coefficient of determination of the regression model based on the above data set is ____ a. 0.9110 b. 0.8300 c. 0.7982 d. 0.815 e. 8.1557

Explanation / Answer

13) Profit is dependent variable and advertisement expenses, sales and salary paid are independent variables.

So correct option is d) all of the above

14) For hypothesis testing for regression coefficient, we use t-test.

So correct option is b) t

15) Total observations are 20

There are 3 independent variables.

Degrees of freedom = 20 - 3 - 1 = 16

So correct option is d) 16

16) df = 16

Level of significance = 0.05

So critical value = 2.1199 ( Using t table)

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