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Poisson Distribution: In studying a rare disease, researchers notice that there is a 1 in 1000 chance of a person contracting the disease in a given year. If the researchers study a population of 10,000 (undiseased) people,
(a) What is mean number of of new diseases expected in the next year?
(b) What is the error (standard deviation) on this number?
(c) What is the chance that fewer than three people will contract the disease?
if 30 claims are selected, find the probability that 15 will contain 0 errors, 8 will contain 1 error, 5 will contain two errors and 2 will contain 3 errors.
Write three quadratic equations, with a, b, and c (coefficients of x2, x, and the constant) as:
The scores of college-bound senior men on the math part of the SAT followed a normal distribution with mean 527 and standard deviation 116.
Bill calculates a linear correlation coefficient between two variable as 1.20. How would you interpret this?
you have obtained a sub-sample of 1744 individuals from the current population survey cps and are interested in the
a game has a spinner that is equally likely to land on any 1 of 4 colors red blue yellow or green. determine the
How large a sample must one take to be 90% confident that the estimate is within 0.05 of the true proportion and find the 99% confidence interval of the population proportion of persons living in Phoenix who are obese.
Has there been a significant decrease in the proportion of students who change their major after the first year in this program? Test at the .05 level of significance.
Consider a liter of 5 puppies (3 brown/2 black). Draw a probability tree indicating the probabilities for selecting 3 puppies without replacement? What is the probability that I will select 3 brown puppies? 1 brown and 2 black puppies? At least 1 ..
A wire of length 50 feet is attached to the ground and to the top of an antenna. The height of the antenna is 10 feet larger than the distance from the base of the antenna to the point where the wire is attached to the ground.
510 people were asked which of four fast food restaurant were their favorite. Determine if there is a preference for any one place over any other.
An auditor for a large oil corporation has taken a random sample of monthly credit card charges for 32 individual (non-corporate) accounts.
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