4) A real estate agent believes that the average closing cost of purchasing a new home…

4) A real estate agent believes that the average closing cost of purchasing a new home is $6500.00 over the purchase price. She selects 40 new homes sales at random and finds the average closing costs to be $6600.00. The population standard deviation is $120.00. Test this claim at alpha equal to 0.05. use the following three methods: Traditional Method P-value Confidence Interval a) Ho: H: b) alpha: cv: c) Test Value: d) Decision: e) Summarize results: