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A certain brand of bicycle lock requires that each of four adjacent wheels be rotated to exactly the correct position in order to open the lock and separate the chain to which it is attached.
If each wheel is labeled with the digits 0 through 9, how many different possibilities are available to the manufacturer in "programming" the sequence of numbers for opening any given lock?
During a recent year the average cost of making a movie was $54.8 million. This year, a random sample of 15 recent action movies had an average production cost of $62.3 million with a variance of $ 8 million.
calculate the standard deviation of the data. for this calculation compute the difference between each one of the
If an applicant passes the "aptitude test for managers," what is the probability that the applicant will succeed in a management position?
the volumes of soda in quart soda bottles are normally distributed with a mean of 32 oz. and a standard deviation of
Dick hits a bull's eye 90% of the time and sally hits a bull's eye 95% of the time. What is the probability that either one or both will hit the bull's eye if each takes one shot? What is the probability that dick ans sally will both hit the bu..
give and describe an example of a nominal measurement
to increase the value of estimated cohens d a researcher increases the sample size. will this change the value of d?a
Corporation has 2000 male and 500 female engineers. Stratified random sample of 200 male and 50 female engineers provides each engineer. How is the stratified sample different from the SRS?
The data below were obtained for the years 1993 through 1998 and indicate the number of fireworks (in millions) used and the related injuries. Predict the number of injuries (provided there is a significant relationship) if 100 million fireworks a..
The number of widgets produced by 9 employees in an eight hour shift is recorded as: 135, 120, 116, 119, 121, 125, 135, 131, 123. What is the median of the number of widgets produced presented above?
A real estate agent collects data to develop a model that will use the Size of a new home (in square feet) to predict its Sale Price (in thousands of dollars). Which of these is most likely to be the slope of the regression line: 0.008, 0.08, 0.8,..
A human society claims that less than 31% of U.S. households own a dog. In a random sample of 392 U.S. households, 155 say they own a dog. At a=0.03, is there enough evidence to support the society's claim?
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