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Find the possibility that the household selected is either prosperous or educated.
Call a household prosperous if its income exceeds $100,000. Call household educated if the householder completed college. Choose an American household at random, and let A be the event that the selected household is prosperous and B the event that it is educated. According to the Current Population Survey, P (A) = 0.138, P (B) = 0.261, and the probability that a household is both prosperous and educated is P (A and B) = 0.082. What is the probability P (A or B) that the household selected is either prosperous or educated?
Suppose you were to cut up the directory and pull out one listing at random to contact.
Which combination of factors has greatest likelihood of rejecting null hypothesis?
Which combination of factors produces smallest risk of Type I error?
See if there is a difference in their means and variances.
Construct a 95% confidence interval for the difference in the proportions of women and men who have regular exercise programs.
A review of voter registration records in a small town yielded the following table of the number of males and females registered as Democrat, Republican, or some other affiliation.
Now he wants to know if there is a difference between the three formats. Is there?
The sample size n , the sample means, and the sample standard deviations for the two groups are given below.
What would that evaluation be and what is the margin of error?
Determine z score corresponding to minimum height requirement and determine z score corresponding to maximum height requirement.
Can we conclude that the mean time for a game is less than 3.50 hours? Use the .05 significance level.
Using Sally's estimate of demand that follows, how many T-shirts should she produce for the upcoming event?
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