Explore BrainMass

Explore BrainMass

    Speedy Lube: Length of Time to Complete a Service Oil Change

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

    The length of time to do a complete full service oil change at Speedy-Lube is normally distributed with a mean of 15.8 minutes and a standard deviation of 2.2 minutes.

    X P(X < x) P(X > x) Mean Std dev
    11 .0146 .9854 15.8 2.2
    15 .3581 .6419 15.8 2.2
    21 .9910 .0090 15.8 2.2
    24 .9999 .0001 15.8 2.2
    p(lower) p(upper)

    (A) Analyze the output above to determine what percentage of complete full service oil changes will fall between 21 and 24 minutes.

    (B) What percentage of complete full service oil changes will take more than 21? If 1000 cars had a complete full service oil change, how many would you expect to be finished in more than 21 minutes?

    © BrainMass Inc. brainmass.com June 4, 2020, 12:10 am ad1c9bdddf

    Solution Summary

    This solution determines the length of time it takes to complete a full service oil change for Speedy Lube.