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The shape of which of the following is determined by degrees of freedom?
A) z-distribution
B) t-distribution
C) F-distribution
D) both b) and c)
E) Degrees of freedom does not determine the shape of any distribution
Make a plot of the ratio of the number of boys born per year to the number of girls in the U.S. What do you see? In what year did we see the most total number of births in the U.S.?
Known population of 1000 students to construct a 95% confidence interval for teh average SAT score. What correction factor should be used to compute the standard error?
What is the probability that a randomly selected child in 2004 lived in poverty? Is whether a child lives in poverty or not independent of whether (s)he lives in a single-parent or married-couple home?
A recent research report shows that the percentage of college students who have been reported for plagiarizing has reached 30% each in the colleges of Education, Arts and Sciences, and Business, but only 10% in the School of Law.
two students from a certain university are randomly selected from all other students who attend that university. the
1. there are two coin purses. the first coin purse contains a penny p and a nickel n. the second coin purse contains a
Formulate null and alternative hypothesis to test for no difference between the population mean credit card charges for groceries and the population mean card charges for dining out.
Is the speed of solving the problem different for people who get such instructions compared to the speed for people who are given no special instructions?
suppose that the battery failure time measure in hours has probability density function given by fx 2 x 13 x?0.what
Nicotine in cigarettes. To determine whether the mean nicotine content of a brand of cigarettes is greater than the advertised value of 1.4 milligrams, a health advocacy group tests
in six test runs a truck operated 8 10 15 7 9 and 11miles with one gallon of gasoline. at the 95 level of confidence is
Assume that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
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