2. A pet food manufacturer runs an experiment to determine whether three brands of dog food ae equally preferred by dogs. In the experiment, 150 dogs are indi- vidually presented with three dishes of food, each containing a different brand, and their choices are noted. Tabulations show that 62 dogs go to brand A, 43 to brand B, and 45 to brand C. Is there sufficient evidence to say that dogs have preferences among the brands? Test at the 10% significance level. (A) No, with x² = 2.09, there is not sufficient evidence even at the 25% signif- icance level. (B) No, with x² = 4.36, there is not sufficient evidence at the 10% level. (C) No, with x² = 19.0, there is not sufficient evidence even at the 0.1% level. (D) Yes, with x² = 4.36, there is sufficient evidence at the 10% level. (E) Yes, with x² = 19.0, there is sufficient evidence even at the 0.1% level.

Attached is question

A-1 3) An amateur golfer wishes to determine if there is a difference between the drive distances of her two favorite drivers. (A driver is a specialized club for driving the golfb 3) down range.) She hits fourteen balls with driver A and 10 balls with driver B. The drive (in yards) for the trials are show below. Driver A 279 295 273 266 262 269 273 305 268 248 241 244 248 308 Driver B 271 238 276 258 272 289 228 295 230 289 Assume that the populations are approximately normal. Construct a 90% confidence inte for the difference between the mean drive distances for the two drivers. A) (-13.5, 24.1) B) (-9.9, 20.5) C) (-12.6, 23.2) D) (-11.0, 21.6) 4) A)0 computor goftwore magazine compares the rates of malware infection for computers

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