Logistics engineering and management

Assignment Help Basic Statistics

Reference no: EM13104556

The following maintenance tasks were observed:

Task Time (Min.) Frequency Task Time (Min.) Frequency

35 2 25 12

17 6 19 10

12 2 21 12

15 4 23 13

37 1 29 8

27 10 13 3

33 3 9 1

31 6 - -

a.) What is the range of observations?

b.) Assuming 7 classes with a class interval width of 4, plot the data and construct a curve. What type of distrubtuion is indicated by the curve?

c.) What is the mean repair time?

d.) What is the standard deviation of the sample data?

e.) The system is required to meet a mean repair time of 25 minutes at stated confidence level of 95% Do the data reveal that the specification requirements will be met? Why?

Reference no: EM13104556

Questions Cloud

Determining confidence interval for mean : Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.

Mean running time of the sample : The running time for videos is normally distributed with mean 390 and standard deviation 148. suppose a sample of 40 videos are selected, what is the probability that the mean running time of the sample exceeds 360 seconds?

What is the total charge of the dipole : An electric dipole includes a charge of 4 ?C and a second charge. What is the total charge of the dipole?

Ethos of foxconn with the basic tenets of ethical relativism : Employees at Foxconn factories described in the e-Activity worked more hours than allowed under Chinese labor laws. Yet the violation of these standards is widespread in manufacturing.

Logistics engineering and management : Assuming 7 classes with a class interval width of 4, plot the data and construct a curve. What type of distrubtuion is indicated by the curve?

At what angle is such a hill inclined above the horizontal : A hill that has a 25.7% grade is one that rises 25.7 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?

Determine the minimum vertical component of velocity : Billy is running on level ground with a speed of 3.5 m/s. He attempts to jump a ditch that is 1.5 meters wide. if the horizontal component of his velocity does not chance.

Survey on household income : A survey on household income in Northeast NJ area gave the following numbers in thousands of dollars:

Tools to help classmate to avoid plagiarism : How would you approach the classmate about concerns? What suggestion could you offer and what tools would you suggest to help that classmate avoid plagiarism?

User Account

All Pages