18. Multiple Choice Question Assume that random variable X be the excess weight of a "1000...
Multiple Choice Question Assume that random variable X be the excess weight of a "1000 grams" bottle of soap. Let X follows a normal distribution with variance 169 g? What sample size is required to have a level of confidence of 95% that the maximum error of the estimate of the mean of the excess weight is less than 1.5g? A. 302 B. 287 C. 289 D. 301 E. 288
Let X be the number of failures for a certain machine during a month. Its cumulative distribution function is 0 if x < 0 0.17 if 0 < x < 1 0.40 if i <r < 2 Fx (2) = { 0.59 if 2<x<3 0.72 if 3 <3 <4 0.80 if 4 <<5 1 if x>5 Compute the probability that there will be more than 3 failures during a month. A. 0.28 B. 0.72 C. 0.20 D. 0.80 E. 0.41
Let X be the number of failures for a certain machine during a month. Its cumulative distribution function is What is the expected number of failures for a month? A. 2.50 B. 3.00 C. 2.32 D. 11.94 E. none of the above 0 if x < 0 0.17 if 0 < x < 1 0.40 if 1 < x < 2 Fx(x) = { 0.59 if 2 < x <3 0.72 if 3 < x < 4 0.80 if 4...
Multiple Choice Question Let random variable X follows an exponential distribution with probability density function fx(x) = 0.5 exp(-x/2), x > 0. Suppose that {X1, ..., X81} is i.i.d random sample from distribution of X. Approximate the probability of P(X1 +...+X31 > 170). A. 0.67 B. 0.16 C. 0.33 D. 0.95 E. none of the preceding
Multiple Choice Question Let X be a continuous random variable with density f(x) = e-5#, x > b. Find b. A. (In 5)/5 B. - (In 5)/5 C. e-5/5 quad D. 3 E. none of the preceding
1.) In the previous question (the one about the multiple-choice quiz), the random variable X is binomial with parameters: n = 1/5, p = 15 n = 15, p = 1/2 n = 15, p = 1/5 n = 15, p = 0 2.) Assume that a procedure yields a binomial distribution with a trial repeated n=5n=5 times. Use technology to find the probability distribution given the probability p=0.164p=0.164 of success on a single trial. (Report answers accurate to 4...