A used car dealer says that the mean price of a three-year-old sports utility vehicle is $24,000. You suspect this claim is incorrect and find that a random sample of 21 similar vehicles has a mean price of $24,778 and a standard deviation of $1980. Is there enough evidence to reject the claim at o = 0.05? Complete parts (a) through (e) below. Assume the population is normally distributed. O C. t> OD.