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Salaries of 40 college graduates who took a statistics course in college have a mean of $62, 200. Assuming a standard deviation of $11,766 construct a 90% confidence interval for estimating the population mean.
lance a long time proprietor of a mens clothing store in peru illinois has noticed that in the past few years that he
Assume a one-tailed t -test is being applied to determine if population mean is less than $212. Level of significance chosen is 0.01 and 26 accounts are sampled. Determine the critical value?
what is the chance the average contents of the cans will be less than advertised and what will be the standard deviation of the number of men who help at home, based on the first survey
question a researcher is interested in comparing tastiness of different kinds of cheese in grilled cheese sandwiches.
What is the p-value and compute a 95% CI for the difference in means between the two groups?
Show that {Xt} is a white noise sequence.This provides an example of a dependent white noise sequence. Prove that Xt and Xt+1 are not dependent.
when 325 college students are randomy selected and surveyed its found that 117 own cars. construct a 99 confidence
For an examination in which grades of 70 and 88 correspond to standard scores of -0.6 and 1.4 respectively. Find:
All subjects in the study were questioned about lifestyle factors including alcohol, tea, and coffee consumption. The resulting data are as follows.
Distinguish between a minimization and maximization LP model. Other than minimizing costs and maximizing profits, give a real-world example of where you would want to minimize something or maximize something.
the genes for eye color in a certain male fruit y are r w. the genes for eye color in the mating female fruit fly are r
Test the hypothesis that the proportion of all student cell phone users in the United States who own a smartphone is 35%. Use the 5% level of significance and report your results.
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