A time study analyst wants to estimate the time required to perform a certain job. A preliminary study yielded a mean of 6.4 minutes and a standard deviation of 2.1 minutes. The desired confidence is 95 percent. How many observations will he need (including those already taken) if the desired maximum error is:a. ± 10 percent of the sample mean?b. One-half minute?

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Time left 1:08:00 A can filling process at a beverage manufacturing factory is assumed to be in control with limits of 84 +3 had sample averages for the x-bar chart of the following: 87.1,87, 87.2, 89, 90, 88.5, 89.5, and 88. Which of the following statement below are correct? O a. Process mean is out-of-control O b. Not enough information to determine O c. Process mean is in-control O d. None is correct NEXT PAGE AGE o 日自 nere to search

Six samples of five observations each have been taken for a process. The sample means and ranges computed (in minutes) are, (mean, range): (3.55, 0.76), (4.03, 0.7), (3.72, 0.41), (3.74, 0.48), (4.09, 0.76), and (3.74, 0.62). Compute the upper control limit a. 4.11 b. 4.172 c. 2.451 d. 2.832

The Money Pit Mortgage Company is interested in monitoring the performance of the mortgage process. Fifteen samples of five completed mortgage transactions each were taken during a period when the process was believed to be in control. The times to complete the transactions were measured. The means and ranges of the mortgage process transaction times, measured in days, are as follows: Sample Mean Range ew an example 1 2 16 12 7 12 Get more help. 3 6 5 4 5 6 7 8 9 15 10 10 13 14 11 9 10 16 13 16 11 Subsequently, samples of size 5 were taken from the process every week for the next 10 weeks. The times were measured and the following results obtained: D Sample Mean Range 16 9 8 17 12 12 18 19 13 7 7 5 20 15 13 MacBook Pro Click the icon to view the table of factors for calculating three-sigma limits for the x-chart and R-chart. a. Construct the control charts for the mean and the range, using the original 15 samples. Set up the R-chart by specifying the center line and three-sigma control…

As part of an insurance company’s training program, participants learn how to conduct an analysis of clients’ insurability. The goal is to have participants achieve a time in the range of 30 to 45minutes. Test results for three participants were: Armand, a mean of 38 minutes and a standarddeviation of 3 minutes; Jerry, a mean of 37 minutes and a standard deviation of 2.5 minutes; andMelissa, a mean of 37.5 minutes and a standard deviation of 1.8 minutes.a. Which of the participants would you judge to be capable? Explain.b. Can the value of the Cpk exceed the value of Cp for a given participant? Explain.

please answer within 30 minutes.

Prepare a run diagram for this emergency call data. Use five-minute intervals (i.e., count the calls received in each five-minute interval. Use intervals of 0 to 4, 5 to 9, etc.). Note: Two or more calls may occur in the same minute; there were three operators on duty this night. What can you conclude from the run chart?

As part of an insurance company’s training program, participants learn how to conduct an analysis of clients’ insurability. The goal is to have participants achieve a time in the range of 30 to 45 minutes. Test results for three participants were the following: Armand, a mean of 36.0 minutes and a standard deviation of 2.0 minutes; Jerry, a mean of 37.0 minutes and a standard deviation of 2.0 minutes; and Melissa, a mean of 37.5 minutes and a standard deviation of 2.6 minutes. a.Compute process capability for the participants and determine whether each is capable, given 4-sigma quality standards. (Do not round intermediate calculations. Round your answers to 2 decimal places.)

Supervisor Kenneth Peterson wants to determine the percent of time a machine in his area is idle. He decides to use work​ sampling, and his initial estimate is that the machine is idle 18​% of the time. ​(Round all intermediate calculations to at least two decimal places before proceeding with further​ calculations.) Part 2 The number of observations that need to be taken by Peterson to be 98.00​% confident that the results will be less than 6​% from the true result​ = enter your response here   ​(round your response to the immediate higher whole​ number).