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Quality control
The manufacturer in Exercise 54 has noticed that the number of faulty cell phones in a produc- tion run of cell phones is usually small and that the quality of one day's run seems to have no bearing on the next day.
a) What model might you use to model the number of faulty cell phones produced in one day?
b) If the mean number of faulty cell phones is 2 per day, what is the probability that no faulty cell phones will be produced tomorrow?
c) If the mean number of faulty cell phones is 2 per day, what is the probability that 3 or more faulty cell phones were produced in today's run?
we are studying the proportion of cities that have private garbage collector. we want a maximum error of 0.10 and a 95
If the mean is 24 inches and the SD is 4.5 inches, What is the height of a plant with a z score of 0? My question is what is the formula used to solve this?
a box contains 10 balls numbered 12...10. two balls are selected at random without replacement.a find the probability
For which of given variables must a "two tail" t-test be applied?
Is the study observational or experimental? Justify your answer. What are the independent and dependent variables?
the manager of a supermarket found that 72 of the shoppers who taste a free sample of a food item will buy the item.
a pair of fair dice is thrown. find the probability p that the sum is 10 or greater if label event and sample spacea a
Short Response: You are mailing 19 packages. It costs between $9 and $12 to mail each package. Estimate the total cost. Explain the method.
What is the expected value of the probability distribution? What is the variance of the probability distribution?
This requires you evaluate the data (on the next sheet) and apply Queueing Theory to determine the characteristics of the queues. Please refer to the concept on Queuing Theory for the procedures to do.
The mean time to complete a construction project is 52 weeks with a standard deviation of 3 weeks. Assuming the probability of completing the project follows a normal distribution, what is the probability of completing the project between 56 week..
Which trend model is best, and why? If none is satisfactory, explain. (e) Make a forecast for 2003, using a trend model of your choice or a judgment forecast.
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