Question 121 pts A researcher is interested in determining if classroom size sig

Question

Question 121 pts

A researcher is interested in determining if classroom size significantly impacts students’ scores on the second statistics test of the term. Which of the following hypotheses is the correct research hypothesis for this scenario?

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Question 131 pts

A researcher is interested in determining if alcohol affects reaction time while driving. Using a driving simulator, the researcher divided participants into two groups: one that will drive without consuming alcohol and one that will drive under the influence of alcohol. Reaction times to several driving distractions are recorded for all participants. In this scenario, the correct null hypothesis to use is ________.

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Question 141 pts

A researcher believes alcohol consumption will increase reaction time while driving. Using a driving simulator, the researcher divided participants into two groups: group one that will drive without consuming alcohol and group two that will drive under the influence of alcohol. Reaction times to several driving distractions are recorded for all participants. In this scenario, the correct research hypothesis to use is ________.

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Question 151 pts

A researcher predicts that caffeine will decrease the time required for participants to complete a memory task. She divides participants into two groups: group one that consumes 2 cups of caffeinated coffee 30 minutes before completing the memory task, and group two that doesn’t consume any coffee or caffeinated beverages at all. The researcher measures the time required for each participant to complete the memory task. Which of the following is the correct research hypothesis to use in this scenario?

Explanation / Answer

121. One question at a time, please. Here' answer to 121 (1st question)

The thing being tested: if classroom size significantly impacts students’ scores on the second statistics test of the term.

So, that there is a difference will be tested.

So, it' H1: X1 != X2

Option 1 is the right option

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