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As part of a study on the metabolism of athletes, 400 college basketball players are randomly chosen and their weights taken. The distribution of the weights is approximately normal. The average weight is 215 pounds and the standard deviation is 15 pounds. Approximately how many players hadweights between 215 and 225 pounds?
What is the purpose of using correlation analysis? How might correlation analysis be used in business decisions or in strategy formulation and implementation?
Suppose that a guest claims that she played the slot machine 5 times and hit the jackpot twice. Find the probability of exactly 2 jackpots in 5 trials.
The announced margin of error is plus or minus 3 percentage points. The announced confidence level is 95%. What is the value of the sample proportion.
It is known that the variance of a population equals 484. A random sample of 81 observations is going to be taken from the population. With a .80 probability, what is the sampling error?
Why do we do power calculations with single sample z test? A) Because we can use Z area tables to calculate the power. B) Because comparing a sample mean against a population mean is very powerful
Arbitrarily choose someone from sample. Determine the probability that they are Jewish and Democrat?
The sample results are given below. At the 0.10 significance level, test the claim that response and major are independent.
What is the best estimate of the average tread life for the entire population of these tires?
Five children under twelve are selected at random. The probability that the average number of hours that they spend each week watching television is at least 30 is about?
Consider a gambler who at each play of the game has probability of winning one unit and probability of loosing one unit. Assuming that the successive plays of the game are independent,
The Grand Strand Family Medical Center is specifically set up to treat minor medical emergencies for visitors to the Myrtle Beach area. There are two facilities, one in the Little River Area and the other in Murrells Inlet.
Do you think a sample of 25 is large enough to give them the margin of error they want? If not, how large a sample do you suggest they take?
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