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1. Once upon a time, there were two railway trains competing for the passenger traffic of 1000 people leaving from Chicago at the same hour and going to Los Angeles. Assume that passengers are equally likely to choose each train. How many seats must a train have to assure a probability of .99 or better of having a seat for each passenger?
2. Assume that, as in Example 9.3, Dartmouth admits 1750 students. What is the probability of too many acceptances?
Find the lowest possible score a candidate can score and still qualify. Assume the scores are normally distributed.
Find the probability that the mean wieght of these 400 bags exceeds 16.6 ounces.
An alcohol awareness task force at Big-Ten university sampled 20 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying
Test the hypothesis that the annual incomes of Teachers in areas of more than 500,000 are significantly more than those in areas of less than 100,000. Use the 5% level of risk.
The team wins 50 percent of their night games and 90 percent of their day games. According to today's newspaper, they won yesterday. What is the probability the game was played at night?
Four are slow songs, and six are fast songs. Each song is to be played only once. In how many ways can the disc jockey play the 10 songs if. The songs can be played in any order.
the grading policy says the cut-offs for the other grades correspond to the following bottom 5 receive f next 10
In using the data from study A to make predictions, what percent of the time would you expect predictions to be exactly correct?
so if you have a variance of 75 for a class average with a standard deviation of - 15. what grade will 96 of the class
a supervisor in the department of rehabilitive services is critical of the performance of one of her counselors. the
If n = 7 and n = 0.35, what is the probability of the following
Determine the mean and the standard deviation of the following frequency distribution. (Round your answers to 2 decimal places.)
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