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A computer package selects at random, and without replacement, three multiple choice questions for you from a bank of 10 questions. Later you decide to have another attempt, so it again chooses three questions at random and without replacement. What is the probability that none of the questions in the second set are the same as any of those in the first set? What must the computer do for there to be no questions in common?
Continuous random variable is uniformly distributed between a and b. The probability density function between a and b is.
The state wanted to see how three different math classes compared, so they gave a standardized test to all the students. Given the following results
When we say we have a confidence level of 95%, what do you think our "margin of error" is? If we move the level of confidence from 95 to 99%, what will happen to our margin of error? What will happen to the width of our confidence interval?
Merrill Lynch Securities and Health Care Retirement, Inc., are two large employers in downtown Toledo, Ohio. They are considering jointly offering child care for their employees.
Consider the linear system x' = Ax, where A is a n x n real matrix. If x = x(t) is a solution of the linear system, we define:
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
Todd is less interested in testing a hypothesis than he is in developing an estimate for what people would be willing to pay. He would like 95% confidence intervals for the average price people would be willing to pay
If the correlation coefficient expresses the degree of a linear relationship, why is it appropriate to use the same formula with nonlinear relationships?
Arnold Palmer and Tiger Woods are two of the best golfers to ever play the game. To show how these two golfers would compare if both were playing at the top of their game, the following data provide the results of 18-hole scores during the PGA tou..
How to calculate expected difference between the samples means, and how does larger variability affect the size of the standard error for the sample mean difference?
They select every 20th person from the list until a sample of 100 is obtained. They then call these 100 people. Does this sampling plan result in a random sample? Simple random sample? Explain.
Suppose nothing in this environment changes. a) Compute the probability the mean number of attacks over the next 10 years is between 500 and 600.
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