An engineer wants to determine the effectiveness of a safety;I program- He collects annual loss of hours due to accidents in 12 plants before and after the program was put into operation. Plant- Eeforg After Plant Before Mite-f\" :l. :l. 2 E 88 7 59 13? 2 133 9 5 S 7-1" 39 3 1 19 108 9 55 7'5 4- Q 5 7 5 10 7? 53 5 9 B 67 1 1 33 53 6 3.36 72 12 1 14 1 13 Click here for the Excel Data File Let the difference be defined as Before After. a. Specify the competing hypotheses that determine whether the safety program was effective. 0 H0119: 0; HAZpD-i O 0 H0: 1195 0; HAin> O 0 H0110? 0; HAZHDsi O b-1. Calculate the value of the test statistic. Assume that the hours difference is normally distributed. (Round intermediate calculations to at least 4 decimal pfaces and final to 2 decimal places.) ream _ b-2. Find the p-value. O 0.025 s p-value