Construct a confidence interval for the mean difference

Reference no: EM131423943

Sadness and spending. The "misery is not miserly" phenomenon refers to how sadness affects a person's spending judgment. In a recent study, 31 young adults were given $10 and randomly assigned to either a sad or a neutral group. The participants in the sad group watched a video about the death of a boy's mentor (from the film The Champ) and those in the neutral group watched a video on the Great Barrier Reef. After the video, each participant was offered the chance to trade $0.50 increments of the $10 for an insulated water bottle. Here are the data as follows:

398_Table 2.jpg

(a) Examine each group's prices graphically. Is use of the t procedures appropriate for these data? Carefully explain your answer.

(b) Make a table with the sample size, mean, and standard deviation for each of the two groups.

(d) Perform the significance test at the α = 0.05 level, making sure to report the test statistic, degrees of freedom, and P-value. What is your conclusion?

(e) Construct a 95% confidence interval for the mean difference in purchase price between the two groups.

Reference no: EM131423943

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