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A boxcar contains six complex electronic systems. Two of the six are to be randomly selected for thorough testing and then classified as defective or not defective.
a. If two of the six systems are actually defective, find the probability that at least one of the two systems tested will be defective. Find the probability that both are defective.
b. If four of the six systems are actually defective, find the probabilities indicated in part (a).
Copying times average 8 minutes according to an exponential distribution. What are the operating characteristics for this system?
Suppose that plants of a particular species are randomly dispersed over an area so that the number of plants in a given area follows a Poisson distribution with a mean density of λ plants per unit area. If a plant is randomly selected in this area..
1. A major amusement park has the following num- ber of visitors each quarter from 2005 through 2009: a. Construct the four-quarter centered moving average for these data and determine the percentages of the moving average for the quarters.
what is the probability of having a length of gestation less than or equal to 36 weeks given that an infant is low
Time closely follows a normal distribution with a mean of 500 seconds and a standard deviation of 72 seconds. What percent of kiosk users take between 600 and 720 seconds?
for the dataset test if there is a difference in the variances of the passes completed by the two players using ? 0.01
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate µ and σ in the formula for the normal approximation to the binomial, and show the final formula you would use without g..
let p1 be the proportion of successes in the first population and let p2 be the proportion of successes in the second
The investor would like to maximize the return on the investment, but the average risk index of the investment should not be higher than 6. How much should be invested in each stock? What is the average risk for this investment? What is the estima..
Although this critique was later discarded, how does user error affect the marketplace. When I buy my morning coffee at Starbucks, the cup warns me: "Careful, the beverage you are about to enjoy is extremely hot."
In part b, sample have greater variability than part a, but sample sizes are unchanged. How does larger variability influence size of standard error for sample mean?
the weights of men are normally distributed with mean of 173 lb and a sd of 30 lb. suppose we choose a random sample of
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