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Education among young adults. Choose a young adult (aged 25 to 29) at random. The probability is 0.13 that the person chosen did not complete high school, 0.31 that the person has a high school diploma but no further education, and 0.29 that the person has at least a bachelor's degree.
(a) What must be the probability that a randomly chosen young adult has some education beyond high school but does not have a bachelor's degree?
(b) What is the probability that a randomly chosen young adult has at least a high school education?
Find the probability that a random selection of 9 songs will have mean length of 186.30 seconds or less. Assume distribution of the lengths of the songs is normal.
A numerical error in preparing his or her income tax return. If 10000 forms are selected at random and examined. Find the probability that 6,7,8, of the forms contain an error.
Use Chebyshev's theorem to find what percent of the values will fall between 120 and 150 for a data set with mean of 135 and standard deviation of 7.5
Jared bets on the number 7 for each of 100 spins of a roulette wheel. Because P(7) = 1/38 he expects to win two or three times. What is the probability that Jared will actually win two or more times?
to test the claim that there is no difference in the lifetimes in months of two brands of video games a sample of
The next table shows the results of this independent t-test. At the .05 significance level, can we conclude that there is a difference in their mean times? Explain these results to a person who knows about the t test for a single sample but is unf..
Their initial expenditure would be drilling, which would cost $80,000. If they strike gas, they would have to spend an additional $50,000 to cap the well and provide for the necessary hardware and control equipment.
Assume the population proportion is p = .25. What is the probability that the sample proportion will be within +/- .03 of the population proportion if a sample of size 1,000 is selected (to 4 decimals)?
suppose that the number of flaws in a certain type of magnetic tape is on average three per 500ft. assuming a poisson
a washington post-abc news poll found that 72 of people are concerned about the possibility that their personal records
Correlation between the two variables - Evaluate the value of the correlation coefficient.
it is known that the variance of a population equals 1296. a random sample of 144 observations is going to be taken
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