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Bigger mammals tend to carry their young longer before birth. The length of horse pregnancies from conception to birth varies according to a roughly Normal distribution with mean 336 days and standard deviation 3 days. What percent of horse pregnancies are longer than 339 days?
A surgical technique is performed on seven patients. You are told there is a 70% chance of success. Find the probability that the surgery is successful for at least four patients.
Given that a firm's top executive made over $1 million, what is the probability that the firm's shareholder return was positive?
what terms describe the fit of a regression equation to the data? what is the importance of the coefficient of
an eight-cylinder car has two cylinders that are defective and need to be replaced. if the mechanic randomly selects
The diameters of certain cylindrical items produced by a machine are r.v.'s distributed as N(m, 0.01). A sample of size 16 is taken and is found that x¯ = 2.48 inches.
A researcher interested in the cultural values of individualistic and collectivistic societies collects data on the rate of relationship conflict experienced.
1. the distribution of actual weights of 8-oz chocolate bars produced by a certain machine is normal with mean 7.8
the mean number of errors per page made by a clerk in the word processing pool of a bank is thought to be 2.8 with the
determine the area under the standard normal curve in parts a through c below. find the area under the normal curve to
At a fancy restaurant n students check their backpacks. They are the only ones to check backpacks. A child visits the checkroom and plays with the check tickets
State the alternative hypothesis that would be used to determine if Brand A has a higher proportion of defective smoke detectors than Brand B. Calculate the test statistic for determining if a difference exists between the failure rates of the two..
What is the standard error of measurement for the test? What range of scores would you expect an individual who made 54 on the test to make on another test of similar difficulty? Assume you want to be 68% accurate in your estimate.
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