In a study examining the effect of alcohol on reaction time, Liguori and Robinson (2001) found that even moderate alcohol consumption significantly slower response time to an emergency situation in a driving simulation. In a similar study, researchers measured reaction time 30 minutes after participants consumed one 6-ounce glass of wine. Again, they used a standardized driving simulation task for which the regular population averages µ = 400 msec. The distribution of reaction times is approximately normal with σ = 40. Assume that the researcher obtained a sample mean of x̅ = 422 for the n = 25 participants in the study. Does the data provide evidence that the alcohol significantly increased (slowed) reaction time? Use a one-tailed test with α = .05. 7a. Which of the following correctly represents the null and alternative hypothesis for the mentioned sample of n = 25 (MUST SHOW WORK FOR THIS PROBLEM)? a. Ho: µ = 400, H1: µ ≠ 400 b. Ho: µ ≥ 400, H1: µ < 400 c. Ho: µ > 400, H1: µ ≤ 400 d. Ho: µ ≤ 400, H1: µ > 400 7b. Which of the following represents the critical region for this mentioned sample (MUST SHOW WORK FOR THIS PROBLEM)? Group of answer choices a. z = ±1.65 b. z = -1.96 c. z = 1.65 d. z = ±1.96 7e. Based on the previously conducted steps, we can conclude (MUST SHOW WORK FOR THIS PROBLEM): Group of answer choices a. The alcohol significantly decreased reaction time. b. The alcohol significantly increased reaction time. c. The alcohol had a significant effect on reaction time. d. The alcohol did not have a significant effect on reaction time.
Please use the following information to answer 7a-7e:
In a study examining the effect of alcohol on reaction time, Liguori and Robinson (2001) found that even moderate alcohol consumption significantly slower response time to an emergency situation in a driving simulation. In a similar study, researchers measured reaction time 30 minutes after participants consumed one 6-ounce glass of wine. Again, they used a standardized driving simulation task for which the regular population averages µ = 400 msec. The distribution of reaction times is approximately normal with σ = 40. Assume that the researcher obtained a sample mean of x̅ = 422 for the n = 25 participants in the study.
Does the data provide evidence that the alcohol significantly increased (slowed) reaction time? Use a one-tailed test with α = .05.
7a. Which of the following correctly represents the null and alternative hypothesis for the mentioned sample of n = 25 (MUST SHOW WORK FOR THIS PROBLEM)?
a. Ho: µ = 400, H1: µ ≠ 400
b. Ho: µ ≥ 400, H1: µ < 400
c. Ho: µ > 400, H1: µ ≤ 400
d. Ho: µ ≤ 400, H1: µ > 400
7b. Which of the following represents the critical region for this mentioned sample (MUST SHOW WORK FOR THIS PROBLEM)?
7e. Based on the previously conducted steps, we can conclude (MUST SHOW WORK FOR THIS PROBLEM):
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