Last year, a car dealer reported that the percentage of its customers who purchase gas, all-electric, and hybrid vehicles were all the same. Following legislation providing tax crefits for energy-efficient vihicles, the car dealer ook a sample of 210 buyers and found that 65 purchased a gas vehicle; 64 purchased an all-electric vehicle; and 81 purchased a hybrid vehicle. With α = 0.05, test to see if the proportions of vehicles purchased have changed after the passage of the tax credits.
State the null and altemative hypotheses.
A. H₀ : The types of vehicles purchased have changed after the passage of the tax credits
Hₐ : The types of vehicles purchased have not changed after the passage of the tax credits.
B. H₀ : The types of vehicles purchased have not changed after the passage of the tax credits.
Hₐ : The types of vehicles purchased have changed after the passage of the tax credits.
C. H₀ : The distribution is normal over the types of vehicles purchased.
Hₐ : The distribution is not normal over the types of vehicles purchased.
D. H₀ : The distribution is not normal over the types of vehicles purchased.
Hₐ : The distribution is normal over the types of vehicles purchased.