Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes

Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes
thinking about what it would mean to be a professor, while the students in group 2 were asked to think about soccer hooligans. These pretest thoughts are a form of priming. The 200
students in group 1 had a mean score of 26.1 with a standard deviation of 4.5, while the 200 students in group 2 had a mean score of 19.4 with a standard deviation of 3.6. Complete parts
(a) and (b) below.
(a) Determine the 90% confidence interval for the difference in scores, u, – up. Interpret the interval
The lower bound is |
The upper bound is
(Round to three decimal places as needed.)
Interpret the interval. Choose the correct answer below.
OA. The researchers are 90% confident that the difference of the means is in the interval
ter
OB. There is a 90% probability that the difference of the means is in the interval.
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ice
C. The researchers are 90% confident that the difference between randomly selected individuals will be in the intervall
OD. There is a 90% probability that the difference between randomly selected individuals will be in the interval
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(b) What does this say about priming?
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O A. Since the 90% confidence interval does not contain zero, the results suggest that priming does have an effect on scores
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tor
OB. Since the 90% confidence interval contains zero, the results suggest that priming does not have an effect on scores
O C. Since the 90% confidence interval contains zero, the results suggest that priming does have an effect on scores.
OD. Since the 90% confidence interval does not contain zero, the results suggest that priming does not have an effect on scores
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S
Click to select your answer(s)
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