Question

# A new design for the braking system for a car has been proposed. For the current...

 A new design for the braking system for a car has been proposed. For the current braking system, the true average braking distance at 40 mph under specified condition is known to be 120 ft. It is proposed that the new braking system design will not be implemented if evidence from sample data indicates that the braking distance is HIGHER (compared to the current system).
 Let µ denote the true average braking distance. State an appropriate hypothesis test that would be useful in determining whether to implement the new braking system.
 Test your hypothesis in part (a) using Type I error α = 0.03 Consider that sample size n= 35, and X-bar = 122.5, and known std dev σ = 11.
 What is the p-value in your hypothesis test in part (b)?

There is no idea given about part a or b. I used as per information given, Type 1 error=0.03

to solve the sums. For any querry do ask in comment box.

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