A used car dealer says that the mean price of a three-year-old sports utility vehicle is $22,000. You suspect this claim is incorrect and find that a random sample of 20 similar vehicles has a mean price of $22,711 and a standard deviation of $1990. Is there enough evidence to reject the claim at a = 0.05? Complete parts (a) through (e) below. Assume the population is normally distributed. (d) Decide whether to reject or fail to reject the null hypothesis. OA. Fail to reject Ho because the test statistic is not in the rejection region(s). B. Reject Ho because the test statistic is in the rejection region(s). OC. Fail to reject Ho because the test statistic is in the rejection region(s). O D. Reject Ho because the test statistic is not in the rejection region(s).

Mr. Erb owns  654.9 acres of land in total. His house and yard sit on 4.8 acres. 347.65 acres are planted with hay. He plans to fence the remaining land for his cows. He calculates the following to determine how many acres will be fenced. 347.65 - 4.8 = 342.85 acres 654.9 - 342.85 = 312.05 acres Mr. Erb concludes he can fence 312.05 acres. Explain his error, and find the actual number of acres Mr. Erb can fence.

there are 14 coins in your pocket that are either quarters or nickles. they total 2.50$. how many of each type of coin do you have?

Calculate the number of combinations, given n = 12 and r = 4.  210  330  495  1,680