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Among 25 years olds, 29% say they have driven while under the influence of alcohol. Suppose two 25-year old are selected at random.
(a) What is the probability that none of the 3 have driven under the influence of alcohol?
(b) What is the probability that at least one has driven under the influence of alcohol?
An employee of the records of ce at a certain university currently has ten forms on his desk awaiting processing. Six of these are withdrawal petitions and the other four are course substitution requests.
In a group of college students there are 200 women, 10 of whom smoke. There are 150 men, 32 of whom smoke. Calculate the probability a randomly selected student is a woman or a smoker.
What is the probability that among the 32 persons who were President of the United States in the period 1789-1952 at least 2 were born on the same day
Transform both heights into z-scores. Which height is more of an outlier?
A county has four major hospitals: 1) Regional Memorial; 2) General; 3) Charity; and 4) City. A multiple regression model is used to compare the time spent in the hospital after a heart by-pass surgery among the four hospitals.
Placement exams. An incoming freshman took her college's placement exams in French and mathematics. In French, she scored 82 and in math 86.
Your spaceship is at rest and detects 2 stars. From your current location the stars located at (3,1) and (7,4) with mean of (3,-1) and (2,-2) respectively.
Sats scores in the US are normally distributed with the mean score of 520 with a standard deviation of 100. Answer the following:
Imagine that the weather forecaster predicts that next Friday's temperature will be 82 degrees F. How many students would you expect to attend class on that day?
Evolution would have been dealt serious setbacks if environmentalists had been around over the eons trying to save endangered species.
in a timecnn survey 24 of 505 single women said that they definitely want to get married. in the same survey 27 of 260
hypothesis tests of claims about the population mean or population standard deviation both require a simple random
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