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Suppose the Union Station in Chicago (a large train station) contains, on average, 20,000 people. Assume trains and people come in an out at a steady rate, without special correlation. What is the range width of the actual number of people present at the Station at any given moment? (For concreteness, assume the fluctuations do not exceed one sigma.)
A study of 20 worldwide financial institutions shows the correlation between their assets and pretax profit to be .86. At the .05 significant levels, can we conclude that there is positive correlation in the population?
Two hundred raffle tickets are sold. Your friend has 5 people in her family who each bought two raffle tickets. What is the probability that someone from her family will win the raffle?
salte corporation is issuing new common stock at a market price of 33. dividends last year were 1.65 and are expected
Case Problem - Stateline Shipping and Transport Company and Read the "Stateline Shipping and Transport Company" Case Problem.
the average price of homes sold in the u.s. in the past year was 220000. a random sample of 81 homes sold this year
four scales of measurement were introduced in the chapter nominal ordinal interval and ratio. what additional
find the approximate value of z that gives an area of 0.025 to the right of it. round your answer to the nearest
The proportion of adults in the sample, as her estimate of p, the proportion of adults in the pond population. Find using the normal approximation with the continuity correction.
using a normal curve table give the percentages of scores between the mean and a z-score ofa 0.56b 0.57c 1.46d 1.56e
Suppose that a company claims that their mean weekly sales are $12,250. A random sample 35 weeks yields a sample mean of with a sample standard deviation of s=$1250.
At a recent meeting of educational researchers comparison were made between the type of college freshmen attend and the numbers who drop out.
the salespeople at quality motor bikes sell up to 5 bikes a month. the probability distribution is as follows in the
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