A g o v e rn m e n t a g e n c y w a n ts to d e te rm in e w h e th e r th e a ve ra g e salaries o f fo u r vario us kinds o f tra n s p o rta tio n o p era to rs differ. A ra n d o m s a m p le o f fiv e e m p lo y e e s in each o f th e fo u r c ateg o ries yields t h e salary d a ta g iven in th e ta b le below :

Average Salaries of Transportation Operators ($1,000s)

Locomotive Engineer Truck Driver Bus Driver Taxi and Limousine Driver 54.7 40.5 32.4 26.8 53.2 42.7 31.2 27.1 55.1 41.6 30.9 28.3 54.3 40.9 31.8 27.9 51.5 39.2 29.8 29.9

a. C o nstruct an A N O V A ta b le a n d e s tim a te th e p -v a lu e .

b. Specify th e c o m p e tin g h yp o th eses in o rd e r to d e te rm in e w h e th e r th e a v e ra g e salaries o f th e tran sp o rtatio n operators differ.

c. A t th e 5 % significance level, can w e conclu de th a t th e a v e ra g e salaries o f th e fo u r tra n s p o rta tio n op erato rs differ?P-36