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2.14 A sample of 100 adults was taken, and these adults were asked about the number of credit cards they possess. The following table gives the frequency distribution of their responses Number of Credit Cards 0 to 3 4 to 7 8 to 11 12 to 15 16 to 19 Number of Adults 23 40 28 Ge a. Find the class boundaries and class midpoints. b. Do all classes have the same width? If so, what is this width? c. Prepare the relative frequency and percentage distribution columns d. What percentage of these adults possess 8 or more credit cards?
math   Statistics-And-Probability   
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