The hard disk access time on a certain model of computers is a random variable with mean 15 milliseconds. A technical modification was proposed in order to decrease this access time. The new system is tested on 10 computers with a sample mean of 14 ms and a standard deviation of 2,286. a) Is there sufficient statistical evidence, at the 0.05 level, in favor of the hypothesis that the new model decreases the access time? b) Calculate the p-value. j State a pair of values of x and s that would have led to a p value of 0.005. What decision should be made in this case regarding the new model? [Answers : tobs=-2.8247 b) a=0.1 c) X = 12.65 or s= 0.973] Please help me with the procedure.