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Suppose that a process is in control with μ = 14 and σ = 2. An X control chart based on subgroups of size 5 is employed. If a shift in the mean of 2.2 units occurs, what is the probability that the next subgroup average will fall outside the control limits? On average, how many subgroups will have to be looked at in order to detect this shift?
a fair coin is tossed 25 times. calculate the chance of getting 17 heads and 8 tails.a. first use the normal
Perform a significance test to assess whether there is an association between mortality from cirrhosis of the liver and duration of employment in the group hired after 1945. Report a p- value.
What is the probability that a randomly selected grapefruit will have a diameter of at least 4.14 inches?
Based on the result, does there to be an overall perception of 1 minute that is reasonably accurate?
You are the manager of a fast food restaurant. You want to determine whether the population mean waiting time to place an order has changed in the past month from its previous population mean value of 4.5 minutes.
The objective function always includes all of the decision variables, but that is not necessarily true of the constraints. Explain the difference between the objective function and the constraints. Then, explain why a constraint need not refer to all..
an experiment was performed to investigate the keyboard feel on a computer crisp or mushy and the size of the keys
The breaking strengths of cables produced by a certain manufacturer have a mean, of 1925 pounds, and a standard deviation of 65 pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength.
Construct the 90% confidence interval for the true population proportion of all voters in the state who favor approval.
Biddle and Hamermesh built a multiple regression model to study the tradeoff between time spent in sleeping and working and to look at other factors affecting sleep.
Car A is known to have a maximum deceleration of 9.35 m/s2. How fast must car A have been going before its brakes were applied? Answer 97.5 km/h (27.1 m/s).
A recent survey reported in Business Week dealt with the salaries of CEOs at large corporations and whether company shareholders made money or lost money.
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