The Following Information Was Obtained from Matched Samples Taken from Two

question 38

Multiple Choice

The following information was obtained from matched samples taken from two populations. The daily production rates for a sample of workers before and after a training program are shown below.Assume the population of differences is normally distributed. $\begin{array}{lll}\text { Worker } & \text { Before } & \text { After } \\1 & 20 & 22 \\2 & 25 & 23 \\3 & 27 & 27 \\4 & 23 & 20 \\5 & 22 & 25 \\6 & 20 & 19 \\7 & 17 & 18\end{array}$
Given that the null hypothesis to be tested is H₀: $\mu$ d = 0,

• A) the null hypothesis should be rejected.
• B) the null hypothesis should not be rejected.
• C) the alternative hypothesis should be revised.
• D) the null hypothesis should be revised.

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Definitions:

Drinking-Related Problems

Issues arising from the consumption of alcohol, including health concerns, social problems, and psychological or physical dependency.

Adversely Affected

Negatively impacted or harmed by a particular event, action, or decision.

Behavioural Disinhibition

A personality trait describing an inability to inhibit behavioural impulses, rebelliousness, aggressiveness, and risk-taking that are associated with the development of alcohol problems.

Personality Characteristic

Traits or qualities that contribute to an individual's distinctive patterns of thinking, feeling, and behaving.