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There is a 60 percent chance that the event A will occur. If A does not occur, there is a 10 percent chance that B will occur. What is the probability that at least one of the events A or B occur?
a researcher is interested in finding out if college-bound high school students tend to smoke cigarettes less than high
Is P(K + 1) = P(K)(365-K)/365 and, If so, why? Find the smallest class size K for which the probability that two or more students have the same birthday exceeds 0.5.
twelve plots of land are divided randomly into 3 groups. fertilizers a b and c are applied to the three groups
Many people attend work and produce little or nothing of value that is why they are terminated.
A television station estimates that 50% of college students watch the super bowl. For a sample of 120 students selected at random, what is the mean and variance of the number of students who watch the game?
This week introduces the chi-square goodness-of-fit-test, which looks for differences across independent groups. Since this is similar to the independent t-test, which looks for differences between independent groups,
If the population standard deviation is σ = 10, can you conclude that the treatment has a significant effect? Use a two-tailed with α = .05.
Find out the sample size raised by mean also standard deviation, a sampling distribution may approach among which of the following values.
a real estate agent has appointments with eight prospective clients. from past experience the agent knows that the
Assuming that = 119.5 ng.ml, test the claim that the mean cotinine level of all smokers is equal to 200.0 ng/ml. Use a 0.05 significance level.
Find the mean and standard deviation for the numbers of boys in groups of 51. b) Is the result of 39 boys unusual? Does it suggest that the gender-selection method appears to be effective?
determine the selling price pv per 1000 maturity value of the bond. hint assume twice-yearly interest payments. round
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