Refer to the Portion of Regression Results in the Accompanying

question 116

Multiple Choice

Refer to the portion of regression results in the accompanying table. When testing the overall significance of the regression model at the 5% level given a critical value of F_{0.05, (2.20)} = 3.49,the decision is to _____________________________________________________________.

• A) reject H₀ and conclude that the explanatory variables are jointly significant.
• B) not reject H₀ and conclude that the explanatory variables are jointly significant.
• C) reject H₀ and conclude that the explanatory variables are not jointly significant.
• D) not reject H₀ and conclude that the explanatory variables are not jointly significant.

---

Definitions:

Significance Level

The threshold in hypothesis testing that determines the probability of rejecting the null hypothesis when it is actually true, often denoted by alpha.

Treatment Group

In experimental research, a group of subjects who receive the treatment or intervention under study.

Placebo Group

A control group in an experiment that receives an inert treatment or substance (placebo) to compare against the effects of the active treatment on the experimental group.

Independent Random Samples

This term describes a statistical method in which each member of a set has an equal probability of being chosen, and the selection of one member is made without influencing the selection of any other member.