Assignment 8 Problems 7.42 [Data Set: NFDA] REVENUE FOR A FULLSERVICE FUNERAL. According to the National Funeral Directors Association (NFDA), the nation's 19,000 funeral homes collected an average of $7,640 per full-service funeral in 2019 (www.nfda.org). A random sample of 36 funeral homes reported revenue data for the current year. Among other measures, each reported its average fee for a full-service funeral. These data (in thousands of dollars) are shown in the following table. 7.9 9.9 5.8 8.9 8.0 7.0 6.7 8.8 7.2 12.1 6.8 6.5 7.9 7.7 7.1 7.7 7.9 6.3 6.8 6.6 7.5 7.7 6.6 5.9 7.9 7.1 a. What are the appropriate null and alternative hypotheses to test whether the average fullservice fee of US funeral homes this year is less than $7,640? 1:. Conduct the test at a : .05. Do the sample data provide sufcient evidence to conclude that the average fee this year is lower than in 2019? c. In conducting the test, was it necessary to assume that the population of average fullservice fees was normally distributed? Justify your