An experiment was conducted to test the effects of coupon value on redemption. Personal interviews were conducted in New York with 280 shoppers who were entering a supermarket. These shoppers were given a coupon for one of four brands prior to entering the store. Two coupon values were used, one offering 15-cents off and the other 50-cents off. Shoppers were randomly assigned to these two coupon-value levels. Four brands — Tide detergent, Kellogg's corn flakes, Aim toothpaste, and Joy liquid dishwashing detergent — were used. These same shoppers were re-interviewed upon leaving the store and asked to report on any coupons used in the store. What is the dependent variable in this experiment?

Suppose that a customer is purchasing a car. he conducts an experiment in which he puts 10 gallons of gas in the car and drives it until it runs out of gas. he conducts this experiment 15 times on each car and records the number of miles driven. full data set car 1 238238 216216 205205 212212 240240 274274 297297 252252 260260 247247 257257 243243 296296 243243 290290 car 2 245245 204204 215215 209209 251251 165165 221221 295295 172172 287287 268268 305305 320320 260260 297297 describe each data set, that is determine the shape, center, and spread. sample mean for car 1 x overbar equalsx=216216 mi / 10 gal (type an integer or decimal rounded to one decimal place as needed.) sample mean for car 2 x overbar equalsx=209209 mi / 10 gal (type an integer or decimal rounded to one decimal place as needed.)