Insurance adjusters are concerned about the high estimates they are receiving from Jocko’s Garage. To see if the estimates are unreasonably high, each of 10 damaged cars was taken to Jocko’s and to a trusted garage and the estimates recorded. Here are the results:


Jocko's: 500,1550,1250,1300,750,1000,1210,1300,800,2500


Other: 430,1500,1300,1280,780,870,1120,1140,650,2290


Use the test of hypothesis procedure to investigate the allegation that Jocko’s Garage over-charges for the car repairs. State the null and alternative hypotheses (H0 and Ha) in a sentence and also using proper Greek symbol(s) for the parameter(s). Show the test statistic calculations with degrees of freedom, and the P-value etc. Use significance level value of 5%. State your conclusion in simple language.