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Twenty-eight percent of college freshmen do not return to college for their sophmore year of study. A random samle of 12 college freshmen is obtained. The probability that exactly two of the 12 freshmen will not return for their sophmore year is?
Construct a perfect one-factorization of K_2n for infinitely many values of n. Prove the factorizations are perfect
Under what circumstances should a nonparametric test be used? Explain. What are the strengths and weaknesses of nonparametric tests? Can the outcomes of nonparametric tests be generalized to populations?
Using this he gives a cost estimate of $24,000 for a new order for 500 units. Is this a reasonable cost estimate? Explain why or why not. Looking at the data on file, can you give a better cost estimate?
The F test is used in Analysis of Variance (ANOVA). When would a researcher use an ANOVA? Explain (one paragraph in length).
The mean and variance of the total amount of money that is collected from a car that crosses the bridge are:
At the 0.05 level of significance, is there evidence to suggest that the population mean waiting time to check out is less than 10.73 minutes?
How can standardized z-scores be used to compare people across different contexts, such as the batting averages of two players -one who played in the 1970s and one who played in the 1990s?
A random sample of 11 health maintenance organizations (HMOs) was selected. For each HMO, the co-payment (in dollars) for a doctor's office visit was recorded. The results are as follows:
Determine the probability mass function of the salesperson's November sales (in $). What is the probabiity that his sales for November will be less than 100k? Find the mean and standard deviation of the November sales.
Critically illustrate out the properties of a normal distribution. Explain why there are an infinite number of normal distributions.
Stalnaker technique: what effect does the independent variable have on the dependent variable? type of hypothesis? what is independent variable? dependent variable?
Suppose we have a ""black box" which on command can generate the value of a gamma random variable with parameters 1.5 and 1. Explain how we can use this black box to approximate
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