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Statistics released by the National Highway Safety Administration show that on an average weekend night in urban areas 1 out of every 10 drivers is operating under the influence of alcohol. If 400 drivers are randomly checked on a saturday night, use the normal approximation to the binomial to determine the probability that the number of drunk drivers will be:
a) less than 32
b) more than 49
c) more than 35, but less than 47.
there are twelve zodiac signs and each person is born under exactly one sign. suppose that each sign is equally likely
two of bags salt and five bags of mahangu cost n41. three bags of salt and ten bags of mahangu cost n 74. formulate two
the u.s. post office is interested in estimating the mean weight of packages shipped using the overnight service. they
Recognize strategies that were utilized to control for nuisance variables and minimize threats to valid inference making.
A sample of 25 concession stand purchases at the May 12 matinee of Spider-Man 3 showed a mean purchase of $ 7.29 with a standard deviation of $ 3.02. For the May 18 evening showing of the same movie.
1. suppose 2 batteries are randomly chosen from a bin containing 10 batteries of which 7 are good and 3 are defective.
compute profit diagrams for the following ratio spreadsa buy 950-strike call sell two 1050-strike callsb buy two
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location.
Found mean number of sticks of gum chewed per day was 9. Standard deviation of population is 1. At α = .05, is number of sticks of gum person chews per day actually is greater than 8?
Interstate 90 is the longest of the east-west U.S. interstate highways with its 3,112 miles stretching from Boston, MA at I-93 on the eastern end to Seattle WA at the Kingdome on the western end. It travels across 13 northern states; the number of..
Explain how the power of hypothesis test is influenced by each of the following. Assume that all other factors are held constant. Increasing the alpha level from .01 to .05.
The mean is 15.8 tons. the sample standard deviation is 5.0 tons. what is the 95 percent interval for the population mean?
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