This exercise focuses on the Springdale Shopping Survey, the setting and data collection instrument for which were provided at the end of Chapter 2. The data are in the computer file SHOPPING.
1. Perform the following operations for variables 18–25:
a. Obtain descriptive statistics, including the mean and median.
b. Generate a box-and-whisker plot for the variable. Does the distribution appear to be skewed? If so, is the skewness positive or negative?
2. Based on the results for question 1, which attributes seem to be the most important and the least important in respondents’ choice of a shopping area?
3. Use their respective coefficients of variation to compare the relative amount of dispersion in variable 29 (number of persons in the household) with that of variable 30 (res pondent’s age).
4. Determine the coefficient of correlation between variable 29 (number of persons in the household) and variable 30 (age). What percentage of the variation in household size is explained by respondent age?

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