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Education and income
Call a household prosperous if its income exceeds $100,000. Call the household educated if the householder completed college. Select 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.
Suppose 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?
let x be a continuous random variable whose probability density function isfxx3 4for an interval 0 lt x lt c.what is
According to the Sleep Foundation, the average night's sleep is 6.8 hours. Assume the standard deviation is 0.6 hours and the probability distribution is normal. a. What is the probability that a randomly selected person sleeps more than 8 hours?
Construct a 99% confidence interval estimate for the population mean weight of the tea bags. Is the company meeting the requirement set fourth on the label that the mean of tea in a bag is 5.5 grams?
For the events A and B, if (A∩B)' =S (where S, of course, is the sample space), then the events CANNOT be mutually exclusive.??b. In a confidence interval for the difference between n matched pairs of observations, the t-distribution to use is with 2..
a study considered the question are you a registered voter? accuracy of response was confirmed by a check of city
In 1998, as the advertising campaign, Nabisco Company announceda "1000 Chips Challenge," claiming. Develop the 95% confidence interval for average number of chipsin bags of Chips Ahoy cookies.
find all the medians for the binomial distribution with parameters bin5
A breakdown of the responses is shown in the accompanying table. Is there evidence at the 10% level to infer that the responses differ among the three groups of employees?
question the gallup organization contacts 1709 adult men who are 40 to 60 yrs of age and live in the united states
The cost of each book is a random variable with mean 30. What is the expected value of his total expenditure? Find the joint PMF of K and N. Find the marginal PMF of N.
Are the assumptions and conditions necessary for inference satisfied? Explain.- Create a 95% confidence interval for the difference in graduation rates between males and females.
Suppose Napoleon were using Bayes' theorm to revise his information. To do so, he would have had to make some judgements about P(Prussian and English Join forces |Napoleon Wins) and P(Prussian and English Join forces |Napoleon loses).
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