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For binomial probability distributions, is there a fast way to find the probability of x being in a range? ex., if i do 30 trials, probability of success is .74, is there a faster way to calculate P(14<=X<=20) than doing p(14) + p(15) + ...+ p(20) ?
A contest. This is a standard deviation contest. You must choose four numbers from the whole numbers 0 to 9, with repeats allowed.
(a) Find the probability that the laser beam device will wear out in 5000 hours or less
A computer chess game and a human chess champion are evenly matched. They play ten games. Find probabilities for the following events.
Biology and Environmental Science Koalas are not really bears, but are related to the wombat and the kangaroo and live in eastern Australia.
a speculator is considering the purchase of a commodity that he reckons has a 60 of increasing in value over the next
1. An investment of R7 500 grows to an amount of R10 200 where interest is compounded quarterly over three years. What is the annual rate of interest? 2. Find the interest rate required for an investment of R5 000 to grow to R8 000 in four years if..
Suppose that X is a normally distributed random variable with mean 10 and variance 25and we take a simple random sample of size 3 and defineW = 0.4X1 + 0.3X2 + 0.2X3.Find P(W > 12)
a population is estimated to have a standard deviation of 16. we want to estimate the population mean within 3 with a
Assume that the standard deviation of monthly rents paid by students in a particular town is $40. A random sample of 100 students was taken to estimate the mean monthly rent paid by the whole student population. What is the probability that the sam..
Let be a random variable with probability function f(x)=144/205x^ 2 , where x=1,2,3,4.
Suppose that a random sample of fifteen recently sold houses in a certain city has a mean sales price of $290000 , with a standard deviation of $15,000.
You paid cash for $1,300 worth of stock a year ago. Today the portfolio is worth $1,888. a. What rate of return did you earn on the investment?
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