114. A survey of the mean number of cents off that coupons give was conducted by randomly surveying one coupon per page

[answerhappygod]

114 A Survey Of The Mean Number Of Cents Off That Coupons Give Was Conducted By Randomly Surveying One Coupon Per Page 1 (39.92 KiB) Viewed 42 times

114. A survey of the mean number of cents off that coupons give was conducted by randomly surveying one coupon per page from the coupon sections of a recent San Jose Mercury News. The following data were collected: 204; 754; 50¢; 65€; 30€; 55¢; 40€; 40€; 30c; 55€; $1.50; 40€; 65¢; 40c. Assume the underlying distribution is approximately normal. a. 1. x = ii. $x = iii. n = iv. n-1= b. c. d. Define the random variables X and X in words. Which distribution should you use for this problem? Explain your choice. Construct a 95% confidence interval for the population mean worth of coupons. i. State the confidence interval. ii. Sketch the graph. iii. Calculate the error bound. e. If many random samples were taken of size 14, what percent of the confidence intervals constructed should contain the population mean worth of coupons? Explain why. Use the following information to answer the next two exercises: A quality control specialist for a restaurant chain takes a random sample of size 12 to check the amount of soda served in the 16 oz. serving size. The sample mean is 13.30 with a sample standard deviation of 1.55. Assume the underlying population is normally distributed.