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Two boxes (A) and (B). Box (A) contains 4 red balls and 5 white balls, box (B) contains 2 red balls and 3 white balls. An experiment consists of drawing a ball from box (A) and placing it in box (B) and then drawing a ball from box (B). Draw the tree and find the probability that at least one ball is white.
Converting data to indexes makes it easier to compare the trend in a series composed of exceptionally large numbers.
A recent article in Business Week listed the "Best Small Companies." We are interested in the current results of the companies' sales and earnings.
Construct a 95% confidence interval estimate for the population proportion of airline travelers who think that the airline fee that is most unreasonable is additional charges to redeem point/miles.
Find the sample mean and sample standard deviation of the amount citizens spend per year. When finding a confidence interval for the true mean spent of ALL citizens, should we use a z-score or a t-score? Why?
Construct a 95 percent confidence interval for the true mean.
The number of shark attacks per year in the US is distributed approximately normal, with a Variance of 31.8 and a standard deviation of 10.
A bus arrives at a bus stop at a uniformly distributed time over the interval 0 to 1 hour. A passenger also arrives at the bus stop at a uniformly distributed time over the interval 0 to 1 hour.
Find the probability that a randomly selected man will be shorter than 78.1 inches. Don't forget the diagrams for (b) and (c).
Suppose that about 48% of all infants are girls. The maternity ward at a large hospital handles 1000 deliveries per year. A smaller hospital in the same city records about 50 deliveries per year. At which hospital is it more likely that between 46..
The scores of students taking the Scholastic Aptitude Test (SAT) are normally distributed with a mean u = 1035 and a standard deviation o = 131.
Prepare an analysis of your survey. Determine if you have used the appropriate measures to research your business problem, and identify the level of measurement being used for each of your survey questions.
A recent study claimed that 15% of all eighth- grade students are overweight. In a sample of 80 students, 9 were found to be overweight. At a= 0.01, is there enough evidence to reject the claim using critical values?
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