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Two marbles are chosen at random from a box that contains 5 red and 5 blue balls. If the balls are the same color, you win $1.10 ; if they are different colors, then you lose $1.00. Let W be the amount that you win. Calculate the mean and the variance of W.
a manufacturer has designed a process to produce pipes that are 10 feet long. the distribution of the pipe length
When would you use a two population test with a small sample size at your place of employment, in your education, or in politics?
n instant lottery ticket costs 2. out of a total of 10000 tickets printed for this lottery 1000 tickets contain a prize
The incubation time for Rhode Island Red chicks is normally distributed with a mean of 21 days and standard deviation of approximately 1 day.
researchers investigated the issue of race and equality of access to clinical trials. the table below shows the
cereal is sold by weight not volume. this introduces variability in the volume due to settling. as such the height to
Why might supposition of normal population be doubtful? Problem arises when?
1. for a standard normal model find the z-value that is less than the mean and for which 67 of the area under the
Show the sampling distribution of p and what is the probability the Times/CNN poll will provide a sample proportion
question for patients with a particular disease the population proportion of those successfully treated with a standard
a) Draw the scatter diagram. Does it appear that x and y are related? If so, how? b) Test to determine whether there is evidence of a linear relationship.
Using a 95% confidence interval, estimate the minimum difference between the mean postexposure attitude score and the mean preexposure attitude score. (Round your answer to 2 decimal places.).
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