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A student's final exam grade depends on how close the student sits to the center of the classroom during lectures. If a student sits r feet from the center of the room, the grade is a Gaussian random variable with expected value 80 - r and standard deviation r. If r is a sample value of random variable R, and X is the exam grade, what is fX|R(x|r)?
Using the population standard deviation of 1.4 ounces, find the sample size required if we want our margin of error to be less than 0.25 ounces with 95% confidence.
The Big Triple at the local racetrack consists of picking the correct order of finish of the first three horses in the ninth race. If there are 12 horses entered in today's ninth race, how many Big Triple outcomes are possible?
What is the Bonferroni adjustment? What would the Bonferroni adjustment be for a study with four groups for which a researcher decided to use t-tests?
the question isa smaple of 50 la crosse school district teachers found that 72 had a summer job. find each of of the
A psychologist is studying the distribution of IQ scores of girls at an alternative high school. In wishing to estimate the average IQ scores in this school.
A random sample of 100 computers showed a mean of 115 gigabytes used with a standard deviation of 20 gigabytes. What is the standard error of the mean?
A product used in a laboratory of the hospital costs $60 to order, and its carrying cost per item per week is one cent. Demand for the item is six hundred units weekly. The lead time is three weeks and the purchase price is $0.60. What is the econ..
find the 95 confidence interval for the standard deviation of birth weights at county general hospital if the standard
calculating probabilitya sample of 400 large companies showed that 120 of them offer free health fitness centers to
A survey of undergraduate students in the School of Business at Northern University revealed the following regarding the gender and majors of the students:
Determine the least squares equation. On the basis of this information, what are the estimated sales for 2005?
What are the primary differences between investments in corporate stock versus corporate bonds? Since bonds pay interest, does that imply the individuals risk exposure is less for investing in bonds rather than stock?
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