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Question: Consider a call center with m = 5 operators that receives, on average, 20 calls per hour. Calls that cannot be immediately served are held in a waiting queue. Each operator costs the employer c = 1/5 units of some currency per minute of conversation. To make profit, each minute of call shall not cost, on average, more than E = 1/3 units of currency. Determine the range of values of the mean service time my for which system is stable and the call-center remains on business.
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).
What linear transformation will change sixth grade scores x into new scores xnew= a+bx that have the desired mean and standard deviation?
Under what conditions would you use cluster sampling? Explain the differences among cluster sampling, simple random sampling, and stratified random sampling.
A survey of random sample of people leaving an amusement park showed an average expenditure number 10.30k for the evening.
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
Who are also athletes but who are not regularly hit in the heads. Is this an example of an experimental or a non-experimental study? Why?
Where could I find credible published data, with specific numbers on influenza and find the crude death rate, infant mortality rate and the incidence rate from two countries?
the national safety council reported that 52 percent of american turnpike drivers are men. a sample of 300 cars
What is your estimate of the standard deviation of the waiting time for a customer? Construct a moving-average control chart using a span of 3. What conclusions can you draw from the chart?
In what ways did Hitler win over the German people? How/why did some remain suspicious? What about America--how did we respond initially and as time grew on?
Compute the probability that a randomly chosen washer found to be defective was manufactured by machine B. Round your answer to two decimal places.
What is its standard deviation of this data set? What are the upper and lower values of 67% range of the flows and how do these compare to the upper and lower values of the full range of data?
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