example, large if it is describing the varlablity from store to store in the price of an ice cube tray. On the other hand, a Standard deviation of $1 would be considered small if it is describing store-to-store variability in the price of a particular brand of freezer. A quantity designed to give a relative measure of variability is the coefficient of variation. Denoted by CV, the coefficient of variation expresses the standard deviation as a percentage of the mean. It is defined by the following formula. CV = 100(s/x) Consider two samples. Sample 1 gives the actual weight (in ounces) of the contents of cans of pet food labeled as having a net weight of 8 ounces. Sample 2 gives the actual weight (in pounds) of the contents of bags of dry pet food labeled as having net weight of 50 pounds. The weights for the two samples are as follows. 8.9| 7.7 7.3 8.9 7.3 Sample 1 7.3 7.5 8.9 8.4 7.3 51.5 50.6 53.0 50.4 50.8 Sample 2 47.0 50.4 50.3 48.7 48.2 In USE SALT (a) For each of the given samples, calculate the mean and the standard deviation. (Round your standard deviations to four decimal places.) Sample 1 7.95 0.5406 Mean Standard Deviation Sample 2 50.0667 x 1.8188 X Mean Standard Deviation (b) Calculate the coefficient of variation for each sample. (Round your answers to two decimal places.) cv, 9.25 CV, 3.63 Need Help? Read it

Cost for standard veterinary services at a local animal hospital follows a Normal model with a mean of $80 and a standard deviation of $20. Fill in the blanks according to this model: The middle 95% of veterinary bills cost between $ type your answer.... 2 type your answer... type your answer... Previous 3 S 3 e d 4 % of veterinary bills are between $60 and $80. % of bills are between $20 and $140. r f % 5 t 9 A 6 y h & 7 and $ type your answer... U n ★ 8 i E 9 k ✔ O P ctri

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. According to the standard deviation rule, almost 2.5% of the students spent more than what amount of money on textbooks in a semester? A. O $195 B. $215 C. $235 D. $275 E. $295

A set of data had a sample mean of 42.0 and a sample standard deviation of 11.0. What is the coefficient of variation (CV), expressed as a percentage, for this set of data?  Round your answer to two decimal places. Do not include the percent sign.   Your Answer: