Explore BrainMass

Explore BrainMass

    Mean Waiting Times of Customers at DMV

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

    The following are mean waiting times and ranges for customers at local DMV cashier line measured at four different times of the day over the last three days. The times are given in minutes from the time a customer enters the cashier line, until the customer is called to the window.

    X1-bar =20, R1 = 4; X2-bar = 24, R2 = 8; X3-bar = 34, R3 = 12
    a Compute the Upper control limit for X- bar chart
    b Compute the lower Control limit for X-bar chart
    c Compute the upper Control limit for an R-chart
    d Compute the lower control limit for an R-chat
    e Plot the X-bar chart and determine if the process is out of control

    © BrainMass Inc. brainmass.com June 3, 2020, 5:18 pm ad1c9bdddf
    https://brainmass.com/statistics/statistical-figures/mean-waiting-times-customers-dmv-20935

    Solution Preview

    Please see attached file

    The following are mean waiting times and ranges for customers at local DMV cashier line measured at four different times of the day over the last three days. The times are given in minutes from the time a customer enters the cashier line, until the customer is called to the window.

    X1-bar =20, R1 = 4; X2-bar = 24, R2 = 8; X3-bar = 34, R3 = 12
    a Compute the Upper control limit for X- bar ...

    Solution Summary

    The expert computes the upper control limit for X-bar charts. The upper and lower control limits are found.

    $2.19

    ADVERTISEMENT