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Every 5 years the Conference Board of the Mathematical Sciences surveys college math departments. In 2000 the board reported that 51% of all undergraduates taking Calculus I were in classes that used...
See AnswerQ: A census by the county dog control officer found that 18%
A census by the county dog control officer found that 18% of homes kept one dog as a pet, 4% had two dogs, and 1% had three or more. If a salesman visits two homes selected at random, what the probabi...
See AnswerQ: The company that sells frozen pizza to stores in four markets in
The company that sells frozen pizza to stores in four markets in the United States (Denver, Baltimore, Dallas, and Chicago) wants to examine the prices that the stores charge for pizza slices. Here ar...
See AnswerQ: Failures of O-rings on the space shuttle are fairly rare
Failures of O-rings on the space shuttle are fairly rare, but often disastrous, events. If we are testing O-rings, suppose that the probability of a failure of any one O-ring is 0.01. Let X be the num...
See AnswerQ: Almost every year, there is some incidence of volcanic activity on
Almost every year, there is some incidence of volcanic activity on the island of Japan. In 2005 there were 5 volcanic episodes, defined as either eruptions or sizable seismic activity. Suppose the mea...
See AnswerQ: In your sock drawer you have 4 blue socks, 5 gray
In your sock drawer you have 4 blue socks, 5 gray socks, and 3 black ones. Half asleep one morning, you grab 2 socks at random and put them on. Find the probability you end up wearing 1. 2 blue socks....
See AnswerQ: Psychiatrists estimate that about 1 in 100 adults suffers from bipolar disorder
Psychiatrists estimate that about 1 in 100 adults suffers from bipolar disorder. What the probability that in a city of 10,000 there are more than 200 people with this condition? Be sure to verify tha...
See AnswerQ: A coin is to be tossed 36 times. 1.
A coin is to be tossed 36 times. 1. What are the mean and standard deviation of the number of heads? 2. Suppose the resulting number of heads is unusual, two standard deviations above the mean. How ma...
See AnswerQ: In 1961 astronomer Frank Drake developed an equation to try to estimate
In 1961 astronomer Frank Drake developed an equation to try to estimate the number of extraterrestrial civilizations in our galaxy that might be able to communicate with us via radio transmissions. No...
See AnswerQ: In a car rental company fleet, 70% of the cars
In a car rental company fleet, 70% of the cars are American brands, 20% are Japanese, and the rest are German. The company notes that manufacturers recalls seem to affect 2% of the American cars, but...
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