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1. Identify the sampling technique used to obtain this sample: A person throws a phone book into the air five times; each time, he selects the tenth number on the page to which it opens.
2. In your own line of work, give one example of a discrete and one example of a continuous random variable, and describe why each is continuous or discrete.
Suppose a machine is worth 33000 after 4 years and 18000 after 8. Find the rate of depreciation using the linear depreciation method
Assume that 89 percent of all batteries have acceptable voltages. Let Y be the number of batteries that must be tested until finding two acceptable ones. What is the probability that Y=6?
Under new grading scale, how many students will have A's, B's, C's, D's and F's? Do you beleive the instructor must grade on a curve? Explain why or why not?
Electric utility customer service representative answers a call is 210 seconds. The Gigantic Kilowatt Energy Company randomly sampled 30 calls and found that, on average, they were answered in 183 seconds with a population standard deviation of 30..
White blood cell counts are helpful for assessing liver disease, radiation, bone marrow failure, and infectious diseases. Listed below are recorded white blood cell counts.
Which of the examples below represent the Ratio level of scaling?
A radio station in Myrtle Beach announced that at least 90% of the hotels and motels would be full for the Memorial Day weekend. The station advised listeners to make reservations in advance if they planned to be in the resort over the weekend.
Using the critical value approach and the sample information reported below, carry out a test of this statement. Let α = 0.05.
Judging from recent experience, 5 percent of the computer keyboards produced by an automatic, high-speed machine are defective
Ffind the mean, variance and standard deviation of binomial distribution? what valuses of the random variable X would you consider unusual?
Verify that the acf display a damped sine wave behavior and find the frequence and period of the acf
If individual luggage weights are independent, normally distributed rv's, what is the probability that total luggage weight is at most 2500 lb?
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