II ESM 1090 PRACTICE EXAM II Summer, 2019 XXXXXXXXXXName:______________________________________ 1. Does good smell bring good business? Businesses know that customers often respond to background...

Please solve these problems


II ESM 1090 PRACTICE EXAM II Summer, 2019 Name:______________________________________ 1. Does good smell bring good business? Businesses know that customers often respond to background music. Do they also respond to odors? Nicolas Gueguen and his colleagues studied this question in a small pizza restaurant in France on Saturday evenings in May. On one evening, a relaxing lavender odor was spread through the restaurant; on another evening, a stimulating lemon odor; a third evening served as a control, with no odor. The Table below shows the amounts (in Euros) that customers spent on the evenings with No odor and Lemon odor. No odor 15.9 18.5 18.5 18.5 21.9 15.9 15.9 15.9 15.9 15.9 18.5 18.5 20.5 18.5 18.5 15.9 15.9 15.9 18.5 18.5 18.5 15.9 18.5 15.9 25.5 12.9 15.9 Lemon odor 18.5 15.9 18.5 18.5 15.9 18.5 15.9 18.5 18.5 15.9 18.5 15.9 21.9 15.9 18.5 18.5 18.5 18.5 25.9 15.9 15.9 18.5 18.5 18.5 18.5 Summary of the above data No odor (N=27) Lemon odor (N=25)  X 475.1 452.5  X2 8,514.99 8,306.65 In order to find out what effect the Lemon odor has on customer spending, answer the following questions. a. Calculate the mean and standard deviation of each group: No odor and Lemon odor. That’s two means and two standard deviations. b. Which group shows more variability in Sales? Explain. c. What is the 68% range of amounts (in Euros) that customers spent on each of these evenings with No odor and Lemon odor (that’s two ranges)? 2. The following data was obtained from 20 participants on Aspiration (ASPIRE) and Academic Achievement (AA). d. Draw a scatterplot of AA scores against ASPIRE scores for the total group (N=20). [Assume X = ASPIRE scores and Y = AA scores] e. AND describe in words what type of relationship appears to exist between ASPIRE and AA in terms of its strength and direction. ID ASPIRE AA 1 1 4 2 2 5 3 3 3 4 4 2 5 5 6 6 4 3 7 7 6 8 6 6 9 5 6 10 4 4 11 4 3 12 5 6 13 5 7 14 6 7 15 7 6 16 5 7 17 6 5 18 7 6 19 8 9 20 9 7 a. What is the Pearson correlation coefficient between Aspiration and Academic Achievement in the total group? Support your answer with calculations. The summary information of the raw data is provided below.  X=103  Y=108  X2=603  Y2=642  XY=600 4. On the basis of the correlation in the total group, the research drew the following conclusion: “The results of the study validates previous research, which has shown Aspiration to be positively related to Academic Achievement. Indeed, it appears that one’s strong Aspiration actually work for an individual in academic achievement, causing them to be more successful in their later life.” Is this conclusion valid? Why or why not? 3 | Page