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A class containing 15 students 5 of them are females. In how many ways can we select a group of 4 male students?
According to recent surverys, 53% of households have personal computers. if a random sample of 175 households is selected, what is the probability that more then 75 but fewer than 110 have a personal computer?
Let X1,... x30 be independent Poisson random variables having mean 1. (a) Use Chebyshev's inequality to find a lower bound on the probability.
The dean of students believes that teh costs are greater this semester. What is the test value for this hypothesis?
Calculate 95 percent and 99 percent confidence intervals for m. Using the 95 percent confidence interval, can we be 95 percent confident that m is at least 50 pounds? Explain.
Assuming the percentages are based on independant simple random samples of 1,000 first year college students drawn each year.
Create a 95 % confidence interval for the true mean. Why might normality be the issue here?
A researcher wants to determine a 95% confidence interval for the mean number of hours that UMKC students spend doing homework per week.
from a deck of five cards numbered 2 4 6 8 and 10 respectively a card is drawn at random and replaced. this is done
Suppose that you're charged with comparing results of standardized tests from four different school districts. What statistical technique would you choose to use?
In the past few years out sourcing over seas has become more frequently used than before by U.S. companies. However, out souring is not with out problems. A recent survey indicates that 20% of the companies that outsource over seas use consultant.
Do you think this detection bias would strengthen or attenuate the association between vegetarian diet and learning disabilities? Defend your choice briefly.
A bar chart to illustrate the differences. What type of statistics was shown? What activities did the newspaper use to make the report?
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