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Replacement times for CD plater are nomally distrbuted with mean 7.1 years and standard deviation of 1.4years. a) fibd the probability that a randumly selected CD player will have a replacement time less than 8 years.b)If you want to provide a warranty so that only 2% of CD player will be replaced before the warranty expires, what is the tome length of the warranty? c) What is p67?
Consider a binomial distribution with 15 identical trials, and a probability of success of 0.5. Find the probability that x = 2 using the binomial tables
Assume that the number of Telephone calls arriving in an office during a 15minute period has a Poisson distribution with mean number of calls equal 5.
Establish a 99% Confidence interval about the difference in the proportion of the town voters and county voters who favor the proposal.
A survey of 500 internet users found that the users were online an average of 6.5 hours a week with a standard deviation of 3.1 hours. If 49 internet users are randomly selected what is the probability that their average time online will be more t..
The mean number of passengers per cruise is 1,820 and the standard deviation is 120.
Make use of normal probability distribution features of EXCEL to help determine the probability.
Mattel Corporation produces a remote-controlled car that requires three AA batteries. The mean life of these batteries in this product is 35 hours with a standard deviation of 5.5 hours. As part of its testing program Sony tests samples of 16 batt..
As you know, the percentile for a value is a measure of where that value stands with respect to the rest of the data. As a criterion for college admissions, why would many schools use a percentile value for a standardized test, rather than a raw s..
To get the best deal for CD player, Jessica called eight appliance stores and asked the cast of a specific model. The prices she quoted are listed below. Show all work. Compute the standard deviation.
Explain how the power of a hypothesis test is influenced by each of the following. Assume that all other factors are held constant.
Customers arrive to the company at a rate, on average, of one per hour with a Poisson distribution. The company is staffed by a single individual(the owner) who takes on average 30 minutes with each customer with a standard deviation of 15 minute..
In a specific company, there are three levels of workers: skilled, unskilled, and manager. The owner of this company wants to know if the level of job satisfaction differs amongst the three levels of workers.
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