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The financial aid office of an American university asks a sample of students about their employment and earnings. The report states "For academic year earnings, a significant difference (p = .028) was found between the sexes, with men earning more on average than women. No difference (p= 0.576) was found between earnings of black and white students." Explain both of these conclusions (including the p-values), for the effects of race and sex on mean earnings, in language understandable to someone who knows no statistics.
Do the data indicate a significant difference in rated attractiveness when the woman appeared to have a tattoo ? use the two tail test with o=.05 with z=______ there _____ a significant difference.
A game company that manufactures a dart game that dispenses tickets has been asked to put a business plan together for a customer who wishes to buy the game.
Are some outcomes of the evolutionary process fundamentally predictable (or inevitable)? Is the path of evolution is guided by deeper principles?
an insurance company is reviewing its current policy rates. when originally setting the rates they believed that the
I'm trying to determine what happens to the sample size if the level of confidence is reduced from 95% to 90% but the allowable error and the standard deviation remain
Verify that P(x) is a probability distribution.- Find the cumulative distribution function.- Find the probability that at most four additional hours are slept.
A 2010 Survey USA poll asked 500 Los Angeles residents, "What is the best hamburger place in Southern California? Five Guys Burgers?
Compute the 95% confidence interval using the two-sample t confidence interval.- Compute the 95% confidence interval using the matched pairs t confidence interval.
Graph the information using a histogram and a scatter plot in Excel as well. How does seeing the information in a graphical format provide more information?
For each of the past 50 days, the number of catalog/coupon packages sent is as shown here. Construct one or more appropriate control charts and comment on the state of control of the process.
Which analysis is appropriate for this situation? Conduct all the steps of the analysis (skip verifying the assumptions).
Normal approximation to the Binomial distribution - Evaluate the probability that at least 195 of the students are female.
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