White Industries  is considering a new method of assembling its buggy golf car. The present method requires 42.3 minutes, on the average, to assemble a car, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes. The sample size is 24.Given the information above answer the questions below.

a. List the five steps to perform hypothesis testing.

               

b. Using the 10 per cent level of significant, can we conclude that the assembly time using the new method is faster?