Find probability that exactly two bushy trees are selected
In one area of an orchard, there are 17 trees, of which 10 are busy and 7 are lean. If 4 trees are randomly selected for testing a new spray, what is the probability that exactly 2 bushy trees are selected?
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Computer response time is an important application of the gamma and exponential distributions. Suppose that a study of a certain computer system reveals that the response time, in seconds, has an exponential distribution with a mean of 3 seconds.
The population proportion is .30. What is the probability that a sample proportion will be within .04 of the population proportion for each of the following sample sizes?
What is the probability that between 482 and 510, inclusive, of the next 1000 randomly selected Valium users from this state would be white-collar workers?
In a particular system containing three components the probability of meeting specification for components 1, 2, and 3, respectively, are 0.95, 0.99, and 0.92. What is the probability that the entire system works?
If 4 trees are randomly selected for testing a new spray, what is the probability that exactly 2 bushy trees are selected?
If an agency receives 3 of these automobiles at random, list the elements of the sample space S using the letters B and Ar for blemished and non-blemished, respectively; then to each sample point assign a value x of the random variable X represent
Of 20 rats in a cage, 12 are males and 9 are infected with a virus that causes hemorrhagic fever. If the selected rat is found to be infected, what is the probability that it is female?
The mean breaking strengths for manufacturers A and B are 14,000 psi and 13,000 psi, respectively. The standard deviations are 2000 psi and 1000 psi, respectively. Which manufacturer will produce, on the average, the fewest number of defective riv
A process for manufacturing an electronic component is 1% defective. A quality control plan is to select 100 items from the process, and if none are defective, the process continues. Use the normal approximation to the binomial to find
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