Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A major automobile company is interested in reducing the time that customers have to wait while having their car serviced with one of the dealers. They select four customers randomly each day and find the total time that each of those customers has to wait (in minutes) while having his or her car serviced. Next, from these four observations, the sample average and range are found. This process is repeated for 25 days. The summary data for these observations are
Σ25i=1 X‾i = 1000,
Σ25i=1 Ri = 250
(a) Find the X‾- and R-chart control limits.
(b) Assuming that the process is in control and that a desirable value on the upper bound of the waiting time is 50 minutes, calculate a process capability index and comment on its value.
(c) Assuming a normal distribution of waiting times, find the proportion of customers that will have to wait more than 50 minutes.
(d) To reduce the waiting time of customers, the service manager hires some additional mechanics, which reduces the average waiting time to 35 minutes. What proportion of the customers will still have to wait more than 50 minutes if the variability in service times is the same as before?
calculate a 90 prediction interval for a randomely selcted single indivdual from the popultation. with a sample mean of
Wheel-Rite has agreed to ship the maximum number of wheel bearings that it produces each day to Itex when an order has been received.
in the biathlon event of the olympic games a participant skis cross-country and on four intermittent occasions stops
??Question: Need a bcg matrix done for lowes 2012 annual sales
If 87 % of people have brown eyes and 4 people selected at random, find the probability that at least one of them has brown eyes
problem 1the table below gives the annual u.s. demand and supply schedules for pickup trucks.a.plot the demand and
a sample of 81 account balance of a credit company showed and average balance of 1200 with a standard deviation of 126.
decide first if binomial or hypergeometric distributions is appropriate. then write which one is most appropriate.
Determine the standard enthalpy change for the vaporization of that substance. The change in molar volume at the normal boiling point is 20.45 L/mol.
What is the probability that this process will be stopped within the next hour and what is the variance of the number of defectives in a batch of 15 ?
A.) The Law of Large Numbers is a statistical theory that you read about in this chapter. In your own words, what does this law say about the probability of an event? Perhaps you have also heard of something called the Law of Averages (also called..
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd