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New Methods and Mean Assembly Times

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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?

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Solution Summary

This solution determines if the assembly time for the new method is faster by conducting a statistical analysis on the null and alternative hypothesis by calculating the test statistic.

Solution Preview

Since sample size is smaller than 30, we use t-statistics
m=40.6 s= ...

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