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Two text books are selected at random from a shelf that contains three statistics texts, two mathematics texts and three physics texts. if x is the number of statistics texts and y the number of mathematics texts actually chosen, construct a table showing the values of the joint probability distribution of x and y.
What is the probability that between 133 and 171 of the business travelers say that the reason for their most recent business trip was an internal company visit?
Also suppose that the probability that the current player does not reach the semifanals of the tournament is 0.58 and that there is a 0.71 probability that jill is ranked next weekon the WTA circuit. What is the probability that the current player..
Which of the given experiments can be modelled by Poisson distribution?
A neurologist wants to detect whether the mean response time for drug-injected rats differs from a control group not injected. The control group has the mean response time of 1.2 seconds.
How large a sample should you take if you want to be 95% confident of the results and you want the error of the confidence interval to be no more than .05?
What is the probability that it will crash at least two times in a given semester? What is the probability that it will not crash at all in a given semester?
Which of the 4 methods of data collection is involved when a person counts the number of cars passing designated location on the Los Angeles freeway system?
If statistically significant, do you think the difference is large enough to be important?
Can we conclude that the mean age of the population from which the sample may be presumed to have been drawn is less than 60 years? Let α = .05
A brand name has a 60% recognition rate. If the owner of the brand wants to verify that rate by beginning with a small sample of 10 randomly selected consumers, find the probability that exactly 6 of the 10 consumers recognize the brand name.
Use a 0.01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury selection system appear to be fair?
A standard deviation of 36 donuts. If a sample of 16 stores results in a sample average of 249 donuts what is the standard error of the mean?
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