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Customers arrive at a music store at an average of 1 per minute (Poisson arrivals). The service rate is 15 customers per hour (exponential service times). What is the minimum number of servers needed to keep waiting time in the system under 5 minutes.
The waiting times have a standard deviation of 4.9 minutes. Use a 0.025 significance level to test the claim that with a single line, waiting times vary less than with individual lines.
It is estimated that 93 % of senior citizens suffer from sleep disorders and 8 % suffer from anxiety. Moreover, 6 % of senior citizens suffer from both sleep disorders and anxiety.
Summarize the article from aricle, generational differences at work in a detailed paragraph.
Two surveys are conducted. Of the 35 two-year colleges surveyed, the mean enrollment was 5,068 with a standard deviation of 4,777.
A company knows that approximately 3 out of every 1000 processors that it manufactures are defective. What is the probability that out of the next 20 processors selected (at random):
suppose that you want to estimate the average age of the residents in your community.a. is this number a parameter or a
In how many different ways can the researches select to patients to receive the trial drug from the total of 20?
As soon as one component fails, the entire system will fail. Suppose each component has a lifetime that is exponentially distributed with λ = .01 and that components fail independently of one another.
Evaluate the area under the standard normal curve that lies to the left of z = - 3.49 and simple random sample of size
Recognizing that the hike to the campsite is a long one, a limit of 35 pounds has been set as the maximum total weight of the items to be carried. Formulate this as a LP problem to maximize the total utility of items carried.
The lengths (in kilometers) of rivers on the South Island of New Zealand that flow to the Tasman Sea are listed in numbers below:
Although controversial and the subject of some recent lawsuits, some human resource departments administer standard IQ tests to all employees. The Stanford-Benet test scores are well modeled by a Normal model with mean 100 and standard deviation 1..
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