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A box contains 1 black ball and 1 white ball. a ball is drawn at random, then replaced in the box with an additional ball of the same color. then a second ball is drawn at random from the three ball in the box. what is the probability that the first ball drawn was white, given that at least one to the two balls drawn was white?
Students that studied for more than one hour received a c+ or above on the final. Use a .05 significance level to test the professor's claim.
The management of a department store is interested in estimating the difference between the mean credit purchases of customers using the store's credit card versus those customers using a national major credit card.
What is the probability that the next customer will request extra unleaded gas and fill the tank (A union B)?
During recent seasons, Major League Baseball has been criticized for the length of the games. A report indicated that the average game lasts 3 hours and 30 minutes.
Construct a 95 percent confidence interval for the population proportion of positive drug tests. Why may you assume that this is a normal distribution?
For a random sample of 23 European countries, the variance on life expetancey was 7.3 years. What is the 95% confidence interval for the variance of life expectancy in all of Europe?
Determine the probability that Mary obtains exactly one Head.
According to an internet posting, 80% of adults enjoy drinking beer. Choose a group of 3 adults at random. The probability that none of them enjoy drinking beer is:
What is the probability that in a sample of 10 pieces: 5 or more will be defective?
Given the same sample mean and the same sample size which confidence interval estimate would be larger and why: One with a 90% confidence level or one with a 95% confidence level?
Create a 99 percent confidence interval for difference in means between Line B and Line C.
Computing the probability values for the given discrete distribution - What is the probability that you did not shake hands with a person with the flu
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