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Question: Your friend John says: "Let toss coins. Each time I'll toss first and then you. If either coin comes up heads, I win. If neither, you win." You say, "There are three possibilities. You may get heads first and the game ends there. Or you may get tails and I get heads, or we may both get tails. In two of the three possible cases, you win." "Right," says your friend, "I have two chances to your one. So I'll put up $2 against $1." Is this a fair bet?
During the last year sales averaged $22,000 per month. Does this indicate that monthly sales have changed (in a statistically significant sense)? Use 0.05. Assume monthly sales are normally distributed.
What maximum variance of the raw score population could you have and still be able to reject the null hypothesis of μ = 20 (α = .05), if the sample size is 100 and the sample mean is 22?
you need to test the alternative hypothesis that an average is greater than 70. if the population average is 70 and
CPI and Subway Fare Find the best predicted cost of subway fare when the consumer Price Index (CPI) is 182.5 (in the year 2000).
a how large a sample should be taken if the population mean is to be estimated with 95 confidence to within 66? the
Which of the two simple linear regression models is the preferred model, and why? Is the multiple regression model preferable to the preferred simple regression model, and why?
a preliminary sample of 100 new childrens toys reveals that three of them are unsafe for children under five years old.
1. thirty eight percent of young adults say they use credit cards because of the rewards program. seven young adults
Design and First Question on Response Rates for a Mail Survey of Skydivers" (Leisure Science, 1991) tested this theory by experimenting with different cover designs.
Describe a study design that would require a matched-pairs t procedure to analyze the results.- Describe a study design that would require a twosample't procedure to analyze the results.
consider the series-parallel networks depicted below. each system comprises four components. the time-to-failure for
what is the probability that you will need to wait for more than a minute before observing the next arrival?- What is the probability you will need to wait at least two minutes?
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