2. Suppose the Road Department wants to examine the safety of compact cars, midsize cars and full-size cars. The department collected a sample of five cars for each of the three-car types and measured the pressure applied to the driver's head during a crash test. Below is the summary of the Analysis of Variance (ANOVA) table. Source Sum of Degree of Mean Squares Freedom Square Treatments 86049.55 (iv) (ii) (V ) (vi) Error 10254.00 Total (vii) (iii) (a) Calculate the value for (i)-(vii) from the table. ( 14 ) (b) Conduct a hypothesis testing to test whether all treatment groups have equal mean using a 5% level of significance. (6)