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A sharpshooter is aiming at a circular target with radius 1. If we draw a rectangular system of coordinates with its origin at the center of the target, the coordinates of the point of impact, (X, Y), are random variables having the joint probability density
a jar of peanut butter contains approximately 425 grams of peanut butter. the u.s. food and drug administration
He is sorry but there is a 99.9% (1-0.001) chance that you have HIV. Is he correct? What is the actual probability that you are HIV positive?
an american roulette wheel has 38 slots 18 are red 18 are black and 2 are green. let r be the number of spins until you
For a study conducted by the research department of a pharmaceutical company, 290 randomly selected individuals were asked to report the amount of money they spend annually on prescription allergy relief medication. The sample mean was found to be..
Suppose we fit the model y = X1β1+ ε when the true model is actually given by y = X1β2 + X2β2 + ε. For both models, assume E(ε) = 0 and Var(ε) = σ2I. where I is the identity matrix. Find the expected value and variance of the ordinary least-squares e..
a team of psychologists studying narcolepsy a sleep disorder characterized by sudden nodding off during the day decided
Suppose that weights of bags of potato chips coming from a factory follow a normal distribution with mean 12.8 ounces and standard deviation .6 ounces.
40 numbers are rounded off to the nearest integer and then summed. if the individual round-off error are uniformly
suppose a sample of 19 scores has a mean of 67.43. two additional scores are added to the sample with values of 64.4
Given: You are using a significance level of α = 0.05 to test a claim that p > 0.5. Your sample is a simple random sample of size n = 49. Calculate β for the test, assuming that the true population proportion is 0.7 and showing all work.
we are studying the proportion of cities that have private garbage collector. we want a maximum error of 0.10 and a 95
serum ferritin is used in diagnosing iron deficiency. in a study conducted recently researchers discovered that in a
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