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The verbal subscale on the SAT (SAT-CR) has a normal distribution with a mean of 500 and a standard deviation of 100. Consider the roughly one million high school seniors who took the SAT last year. If one of these students is selected at random, what is the probability that his or her SAT-CR score will be:If one
(a) 460 or higher?
(b) between 460 and 540?
(c) 680 or higher?
(d) as extreme as 680?
(e) The probability is .50 that the student's SAT-CR score will be between what two values?
(f) The probability is .10 that the student's SAT-CR score will fall above an SAT-CR score of _____?
(g) The probability is .10 that the student's SAT-CR score will fall below an SAT-CR score of _____?
The Mathematics Department of the University of Louisville consists of8 professors, 6 associate professors, 13 assistant professors.
listed are the ages in years of randomly selected race car drivers use a 0.05 significance level to test the claim that
An orange juice producer buys only one kind of oranges. The amount of juice squeezed from each of these oranges is approximately normally distributed with a mean of 4.2 ounces and a population standard deviation of 1 ounce.
Assume that workers at each platform will beable to load 4 trucks per hour each and that truckswill continue to arrive at the rate of 3 per hour. Find the waiting line's new operating conditions. Is thisnew approach indeed speedier than the other two..
a. At the 0.05 level of significance, is there evidence that the mean life is different from 7,500 hours? b. Compute the p-value and interpret its meaning. c. Construct a 95% confidence interval estimate of the population mean life of the CFLs.
to test the effectiveness of a new drug designed to relieve pain 250 patients were randomly selected and divided into
Knowing that there are usually fewer women who run marathons than men, and that more people ran in the amateur marathon.
in a linear regression model of predicting first year sales using an aptitude test the coefficient of multiple
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
Suppose that the monthly pay is normally distributed with a standard deviation of $400. What is the probability that the monthly pay of a bank teller.
Is there sufficient evidence to reject the claim that the mean annual income of teachers in state of Utah is greater than or equal to the mean annual income of teachers in Oregon? Perform a one-tailed test.
In 2006, there were about 11 million commercial flights in the United States. If one is selected at random, what is the probability that it involved a fatal accident
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