Exhibit 13-5
Below You Are Given a Partial Minitab Output

question 108

Multiple Choice

Exhibit 13-5
Below you are given a partial Minitab output based on a sample of 25 observations.
$\begin{array}{lcc}&\text { Coefficient }&\text { Standard Error }\\\text { Constant } & 145.321 & 48.682 \\\mathrm{X}_{1} & 25.625 & 9.150 \\\mathrm{X}_{2} & -5.720 & 3.575 \\\mathrm{X}_{3} & 0.823 & 0.183\end{array}$
-Refer to Exhibit 13-5. Carry out the test of significance for the parameter ?? at the 5% level. The null hypothesis should be

• A) rejected
• B) not rejected
• C) revised
• D) None of these alternatives is correct.

---

Definitions:

Null Hypothesis

A statistical hypothesis that assumes no effect or no difference in an experiment or study, serving as the default assumption to be tested.

Probability

Probability is the measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Statistic

A single measure, calculated from sample data, used to summarize a characteristic of the sample.

Critical Value

A point on the scale of a test statistic beyond which the null hypothesis is rejected, often determined by the desired significance level.