The data below represent the weight losses for people on three different exercise programs. if we want to test the claim that the three size categories have the same means, why don't we use three separate hypothesis tests for mu 1=mu 2, mu 2=mu 3, and mu 1=mu 3? exercise a exercise b exercise c 2.5 5.8 4.3 8.8 4.9 6.2 7.3 1.1 5.8 9.8 7.8 8.1 5.1 1.2 7.9 a. a hypothesis test for comparing two means does not exist. b. the risk of type ii error increases and becomes too high. c. the risk of type i error increases and becomes too high. d. actually, we do want to use three separate hypothesis tests.

Data for the height of a model rocket launch in the air over time are shown in the table. darryl predicted that the height of the rocket at 8 seconds would be about 93 meters. did darryl make a good prediction? yes, the data are best modeled by a quadratic function. the value of the function at 8 seconds is about 93 meters. yes, the data are best modeled by a linear function. the first differences are constant, so about 93 meters at 8 seconds is reasonable. no, the data are exponential. a better prediction is 150 meters. no, the data are best modeled by a cubic function. a better prediction is 100 meters.