Statistical Analysis of Golf Cart Assembly

The management of White Industries is considering a new method of assembling its golf cart The present method requires 42.3 minutes, on the average to assemble a cart. The mean assembly time for a random sample of 24 carts using the new method was 40.6 minutes and the standard deviation of the sample was 2.7 minutes. Using the .10 level of significance can we conclude that the assembly time using the new method is faster?

a) State the null hypothesis and the alternate hypothesis.
b)Show the decision rule graphically. Use the .05 significance level.
c)Compute the value of t.
d)What is your decision regarding the null hypothesis
e)Briefly summarize your results.

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