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Let Yn=Max (X1,X2.....Xn). By an elementary probability argument show that Yn has cumulative distrubtion function: Fyn(y)= {0 (y<(or equal to)0) (1-e^-y/lambda)^n (y>0) I know that the negative exponential cdf is this but how does the MAX(X1....Xn) result in...
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Suppose the correlation between two variables x and y is due, in part, to the fact that y is responding to changes in some unobserved third variable. What is this due to? (a) Cause and effect between x and y (b) The effect of a lurking variable (c) Extrapolation (d) Common sense (e) None...
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What probability value would be needed to complete the following probability distribution? x -2 -1 0 1 2 P(x) 0.09 0.23 0.15 0.29 Choose one answer. a. 0.14 b. 0.28 c. 0.43 d. 0.72
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A recent study of breast cancer revealed that 13% of the women in the sample used antibiotics more than 500 days in their lifetime. Further, 79% of these heavy antibiotics users developed breast cancer. According to the American Cancer Society, one in twelve women will develop breast cancer...
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The US Army Training and Doctrine Command (TRADOC) announced that it costs the Army at most $54,700 to train a basic combat arms solider. A Congressman believes that the true cost to train a basic combat arms soldier is higher than TRADOC s number. The Congressman obtains authorization for...
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. The average gasoline price of one of the major oil companies has been $3.00 per gallon. Because of shortages in production of crude oil, it is believed that there has been a significant increase in the average price. In order to test this belief, we randomly selected a sample of 36 of the...
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a manager of a supermarket estimated that 87% of customers use coupons in their grocery purchases. How large a sample is required to estimate the true proportion to within 0.01 with 98% confidence?
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A multiple-choice examination consists of 85 questions, each having possible choices a, b, c, and d. Approximate the probability that a student will get at most 23 answers correct if he randomly guesses at each answer.
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is this life worth living?
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what are the similarities between t-statistic and f-ratio?
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