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According to a survey of 25,000 households conducted by Nielson Company, 51% of the people watching the 2010 Super Bowl enjoyed the commercials more than the game itself. Consider a random sample of nine people who watched the Super Bowl:
a survey of 25 randomly selected iphone owners showed that the purchase price has mean of 440 with a sample standard
consider two urns labeled a and b. there are a total of 3 orange balls and 3 blue balls. an experiment consists of
Should the engineering firm be concerned? Perform an appropriate hypothesis test, showing the necessary calculations and or explaining the process used to obtain the results.
The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivation, attitude, and study habits of college students.
an article claims that movie attendance in the u.s. has declined significantly since 2008 but that there is still a
When performing a 2-way ANOVA with replication you must first: A) Perform an interaction hypothesis test B) Take out the error because you ran replicates and error makes no sense with replicates
If a random sample is to be drawn from a population consisting of 5000 sampling units with a variance of 20% and a desired standard error of 1.6%. What is the optimal sample size?
Generate a 95% confidence interval for the difference in mean numbers of cups of coffee consumed between men and women.
What decision would be made if the researcher used a one-tailed test with an alpha level of .05? (Assume that the herb is expected to increase scores.)
A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10,000.
In an evaluation of the medical lab, the manager is interested in the efficiency of three technicians when they process four routine blood tests.
Use the given margin of error, confidence level, and population standard deviation (o) to find the minimum sample size required to estimate an unknown population means (u)
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