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A wholesaler assures retailer replacement times for TVs normally dist. with mean of 8.2 and s.d. of 1.1. The retailer finds that a random sample of 20 sets from the wholesaler have mean replacement time of 7.6 years. Find P of getting a sample of 20 TVs with a mean replacement time of 7.6 years or less.
Is wholesaler trustworthy?
Probability based on binomial distribution - evaluate the probability of x successes in the n independent trials of the experiment.
The issue of how much should be spent to solve particular U.S. social problems is a complex matter, and people have diverse and conflicting ideas on these issues.
She figures that each box costs $ 2.59 plus $ 0.21 shipping and handling, which totals $ 2.80, then she adds $ 0.70 profit to each box and sells it for $ 3.50. Do you think this is a good pricing strategy? How would it compare to marking up by a p..
The quality-control inspector checks 200 pieces in a certain operation. The piece is either good or defective. The record for nine hours.
a) Find the marginal density of Y. b) Find E(X) HINT: What is E (X|Y=y) ?
Critically illustrate out the purpose of developing frequency distribution? Describe the relationship between the relative frequency and the cumulative frequency.
Use given data to create the unbiased point estimate of 12σ'> 2 of percentage of termites that are minor workers.
There are 4000 mangoes in a shipment. It is found that it a mean weight of 15 ounces with a standard deviation of 2 ounces.
Set up hypotheses and test to find out whether or not population variance is larger than $100.
The director of Heating and Oil at Mitchell Brothers Company is concerned about the high cost of home heating oil being offered to their customers for the upcoming Fall season in Boston, MA. The company has no possibility of modifying the oil pri..
In the data collected for construction of c chart, the average number of defects per unit of output is c = 7.5. Discuss the 3-sigma upper and lower control limits for the control chart?
To estimate the true proportion of students who abstain from alcohol at LBCC, you will need to take a simple random sample.
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