Not counting the ones that failed immediately, certain light bulbs had useful lives of 415, 433, 489, 531, 466, 410, 479, 403, 562, 422, 475, and 439 hours. Assuming that these data can be looked upon as a random sample from a two-parameter exponential population, use the estimators obtained in Exercise 10.56 to estimate the parameters ∂ and θ.
Answer to relevant QuestionsData collected over a number of years show that when a broker called a random sample of eight of her clients, she got a busy signal 6.5, 10.6, 8.1, 4.1, 9.3, 11.5, 7.3, and 5.7 percent of the time. Assuming that these ...The I.Q.’s of 10 teenagers belonging to one ethnic group are 98, 114, 105, 101, 123, 117, 106, 92, 110, and 108, whereas those of 6 teenagers belonging to another ethnic group are 122, 105, 99, 126, 114, and 108. Assuming ...If x is a value of a random variable having an exponential distribution, find k so that the interval from 0 to kx is a (1 – α) 100% confidence interval for the parameter θ. A medical research worker intends to use the mean of a random sample of size n = 120 to estimate the mean blood pressure of women in their fifties. If, based on experience, he knows that σ = 10.5 mm of mercury, what can he ...A major truck stop has kept extensive records on various transactions with its customers. If a random sample of 18 of these records shows average sales of 63.84 gallons of diesel fuel with a standard deviation of 2.75 ...
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