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"Suppose the world series is about to begin. Some people get together and each decide to predict different win-loss patterns for the seven possible games during the coming series. How many people would be needed before being certain that one of them would correctly predict the future of the world series?"
About what percent of the observations lie between 55 and 65?
The superintendent of a printing plant has selected a random sample of 100 rolls of paper from a large shipment. The average length of the sample rolls is 416 feet, with a variance of 2704 feet.
Formulate the hypotheses to test to see if the mean of the population is at least 12 ounces.
An experiment consists of flipping the fair coin three times and noting the number of heads and tails. A random variable x is defined to be two times the number of heads plus the number of tails.
Construct a 95% confidence interval for the population mean.
Your younger brother comes home one day after taking a science test. He says that someone at school told him that "60% of the students in the class scored above the median test grade." What is wrong with this statement? What if he said "60% of the..
Which is the estimated or dear proportion of defective cups in the population?
How closely is the height of an individual related to the weight? Partial regression output for a sample of 92 individuals is below.
The mean number of flaws per 100 m of material produced on a certain machine at Blanktown Fabrics is 2. If flaws occur randomly, find the probability that in 50 m of material there will be less than 2 flaws.
Assume the probability that you will make a sale on any given telephone call is 0.11. Find the probability that you make your first sale on the fifth call, make your sale on the first, second, or third call, and do not make a sale the first three ..
You are assigned to be part of a team of three analysts of a global management consulting company where of the entire work force of analysts. 55% have had no experience in telecommunications
What is the likelihood the sample mean is greater than $22.50 but less than $25.00?
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