assignment, repeat part (b). 10.| Marketing: Age What is the age distribution of promotion-sensitive shop- pers? A supermarket super shopper is defined as a shopper for whom at least 70% of the items purchased were on sale or purchased with a coupon. The following table is based on information taken from Trends in the United States (Food Marketing Institute, Washington, D.C.). Age range, years 18-28 29-39 40-50 51-61 62 and over Midpoint x 23 34 45 56 67 Percent of super shoppers 7% 44% 24% 14% 11% <> For the 62-and-over group, use the midpoint 67 years. (a) Using the age midpoints x and the percentage of super shoppers, do we have a valid probability distribution? Explain. (b) Use a histogram to graph the probability distribution of part (a). (c) Compute the expected age µ of a super shopper. (d) Compute the standard deviation o for ages of super shoppers. 11.| Marketing: Income What is the income distribution of super shoppers (see Problem 10). In the following table, income units are in thousands of dollars, and each interval goes up to but does not include the given high value. The midpoints are given to the nearest thousand dollars. Focus 目 昂 年川 394 words English (United States) ne to RedShelf eReader! derstanding Basic St... Fexs g started? Head over to our partner support page for a guide on the basics. THE BINOMIAL PROBABILITY DISTRIBUTION AND RELATED TOPICS Income range 5-15 15-25 25-35 35-45 45-55 55 or more Midpoint x 10 20 30 40 60 Percent of super shoppers 21% 14% 22% 15% 20% 8% <. (a) Using the income midpoints x and the percent of super shoppers, do we have a valid probability distribution? Explain. (b) Use a histogram to graph the probability distribution of part (a). (c) Compute the expected income u of a super shopper. (d) Compute the standard deviation o for the income of super shoppers. Britain at the time of Florence Nightingale? Thanks to Florence Nightingale fallouring information (based on 12. | History: Florence Nightingale What was the age distribution of nurses in Great 50