Need help with #19,20,21 please.. need explained exactly how the answer was gott
ID: 3062434 • Letter: N
Question
Need help with #19,20,21 please.. need explained exactly how the answer was gotten as well please. Thank you!5) for sample means? means when those means any couples believe that it is getting too expensive to host an "average wedding in the United States. Accoeding to a statistics study in the U.S, the average cost of a wedding in the U.S. in 2014 was $25,200. Recently, in a random sample of 35 weddings in the U.S. it was found that the average cost of a wedding was $24,224 with a standard deviation of $2,.210 19) Which method should be used for finding a 95% margin of error for the sample mean for this 19) example? A) Find the critical t value for the given level of confidence and multiply by the standard error B) Find the critical z value for the given level of coefidence and multiply by the standard error C) Find the critical z value for the given level of confidence and multiply by the standard error D) Find the critical t value for the given lervel of confidence and multiply by the standard error using the formula using the formula s using the formula using the formula s Solve the problem. 20) An economistenducted a hypothesis test to test the claim, that the average cost of eating a meal 20 away from home decreased from 2009 to 2010. The average cost of eating a meal away Erom home in 2009 was $7.15 per person per meal. Assume that all conditions for testing have been met. He used technology to complete the hypothesis test. Following is his nall and alternative hypothesis and the output from his graphing calculator Ha:
Explanation / Answer
9)
B)
Find the critical z value for the given level of confidence and multiply by standard error using the formula s/sqrt(n)
20)
B)
Fail to rejct the null hypothesis. There is not sufficient evidence to support the claim
21)
d) the samples are independent