Explore BrainMass

Explore BrainMass

    Hypothesis testing problems - MacBurger chain & White Industries

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Dear OTA,

    Please help me with the attached problems with steps.


    1) The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute. The quality-assurance department found in a sample of 50 customers at the Warren Road MacBurger that the mean waiting time was 2.75 minutes. At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?

    2) 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?

    © BrainMass Inc. brainmass.com June 3, 2020, 9:12 pm ad1c9bdddf

    Solution Summary

    This posting contains solutions to the hypothesis testing questions, providing step-by-step solutions based off the five step approach to hypothesis testing.