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In an experiment on magazine advertisements, a researcher is examining visual displays to determine if one is more memorable. Only a small number of subjects will be avaliable for study. Should the researcher use a repeated measures design or independent samples design? and Why?
A Statistic professsor plans classes so carefully that the lenths of her classes are uniformly distributed between 46.0 and 56.0 minutes. Find the probability that a given class runs less than 51.5 minutes. Find the probability of selecting a clas..
suppose that n units are randomly sampled and x number of the sampled units are found to have the characteristic of
Is there a significant difference in the proportions of patients reporting pain relief? Run the test at a 5% level of significance.
An official of the Iowa Department of Highways wants to compare the useful life, in months, of two brands of paint used for striping roads. The mean number of months Cooper Paint lasted was 36.2 with a standard deviation of 1.114 months.
The winning team's scores in 7 high school basketball games were recorded. If the sample mean is 10.3 points and the sample standard deviation is 0.10 points,
What is meant by a probability distribution? Discuss how you could use one of the text probability distribution at your workplace to help solve a business problem.
For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing grade is 40 %.
Find the critical t-value that corresponds to 90% confidence. Assume 90 degrees of freedom.
find the mean variance and standard diviation of the binomial distribution with the given values of n and pn- 121 p
The following table summarizes data between money spent on gambling and winnings for Robert.
They wish to conduct a survey of their students and find a simple random sample of 50 Freshmen, 40 Sophomores, 35 Juniors, and 30 Seniors.
because only two of the seven regression coefficients are statistically significant. Yet in some initial trials the expanded model is giving more precise sales predictions than the smaller model. The reasons for this anomaly are now being investig..
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