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For a certain musician, his favorite brand of guitar picks is far more likely to chip accidentally (and become useless) than to wear out. He drops by his local music shop to buy another one whenever his pick chips, on average 3 times a year. The shop has 4 picks in stock, in addition to the one he is using.
a) What are the average and standard deviation of the time (in months) until he goes to the shop and discovers they will have to order the pick he wants?
b) What is the probability that, 1.5 years from now, he will still have a usable pick without having had to order more?
The time between arrivals of customers at the drive-up window of a bank follows an exponential probability distribution with a mean of 10 minutes. What is the probability that the arrival time between customers will more than 20 minutes?
Assume the cholesterol levels of adult American women are normally distributed with a mean of 190 mg/dL and a standard deviation of 26 mg/dL. What percent of adult women do you expect to have cholesterol levels at least 200 mg/dL?
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What proportion of children 10 to 15 years of age would be classified as hyperlipidemic assume that hyperlipidemia is defined as cholesterol level over 200?
Test the hypothesis at the 0.05 level. What is the value of the test statistic calculated from the sample data? What is the critical value of the test statistic?
Is the number of children that a college student currently has independent of the type of college or university being attended?
The central district students failed. Develop a probability tree showing all marginal, conditional and joint probabilities. Develop a joint probability table.
question in 200534 of workers reported that their jobs were more difficultwith more stressand 37 reported that they
A manufacturer of computers claims its batteries last an average of 3.5 hours before needing recharging. For a sample of 10 batteries, the mean life was 3 hours and the standard deviation
Finding the value of test statistic utilizing two-tail 't' test also interpret the result. The Commercial Bank as well as Trust Company is studying the use of its automatic teller machines.
To test the given claim using Single Proportion Z test.
A real estate agent in the coastal area of Georgia wants to compare the variation in the selling price of homes on the oceanfront with those one to three blocks from the ocean sample of 21 oceanfront homes sold within the last year revealed the st..
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