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Persons entering a blood bank are such that 1 in 3 have type O+ blood and 1 in 15 have type O- blood. Consider three randomly selected donors for the blood bank. Let X denote the number of donors with type O+ blood and Y denote the number with type O- blood. Find the probability distributions for X and Y. Also find the probability distribution for X + Y , the number of donors who have type O blood.
Let X1,..., Xn be a random sample from a distribution with pdf r 2β-2x , 0 x β f(x) = β2 0, otherwise. Use the method of moments to obtain an estimator of β.
The average amount of time between a score by either team in college soccer games is 15.2 minutes.
If the player does not win or lose on his second roll he continues to roll, using the same criteria given for the second roll.
Compute the power of the previous test if the true proportion of adults having access to the internet in the population is 41%. What is the power if the true proportion is 42%? 43%?
Suppose the people living in a city have a mean score of 48 and a standard deviation score of 7 on a measure of concerns about the environment.
Identify a new law or regulation that affects the practice of public health or community health nursing. Discover the sponsor of the action. Using news reports, statements in the public record, personal telephone or other interview data, outline t..
A random sample of gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents?
the intensity of light re?ected by an object is measured. suppose there are two types of possible objects a and b. if
the kamp family has twins rob and rachel. both rob and rachel graduated from college two years ago and each is now
State the formula for the test statistic and show your decision rule using the 1 percent level of significance. (c) Carry out the test. Show your work. (d) What assumptions are required?
500 trials where each trial consists of tossing four coins and counting the number of heads. find the number of cases
the number of cases of tetanus reported in the u.s. during a single month in 1989 has a poisson distribution with a
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