Distribution of buying frequency rates

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The article "The Distribution of Buying Frequency Rates" (Journal of Marketing Research [1980]: 210-216) reported the results of a 31 2-year study of toothpaste purchases. The investigators conducted their research using a national sample of 2071 households and recorded the number of toothpaste purchases for each household participating in the study. The results are given in the following frequency distribution:

1354_frequency distribution.png

a. Draw a histogram for this frequency distribution. Would you describe the histogram as positively or negatively skewed?

b. Does the square-root transformation result in a histogram that is more nearly symmetric than that of the original data? (Be careful! This one is a bit tricky because you don't have the raw data; transforming the endpoints of the class intervals will result in class intervals that are not necessarily of equal widths, so the histogram of the transformed values will have to be drawn with this in mind.)

Reference no: EM131820318

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