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The following quote is from the article "Canadians Are Healthier Than We Are" (Associated Press, May 31, 2006): "The Americans also reported more heart disease and major depression, but those differences were too small to be statistically significant." This statement was based on the responses of a sample of 5183 Americans and a sample of 3505 Canadians. The proportion of Canadians who reported major depression was given as .082.
a. Assuming that the researchers used a one-sided test with a significance level of .05, could the sample proportion of Americans reporting major depression have been as large as .09? Explain why or why not. b. Assuming that the researchers used a significance level of .05, could the sample proportion of Americans reporting major depression have been as large as .10? Explain why or why not.
Estimate the difference in mean travelling time to campus by taxi and bus by constructing a 90% confidence interval.
Describe how hypothesis testing might be used in a presidential election. Support your response. Provide at least one academic source.
1. What can we learn through examination of the relationship between the observed and expected values with regard to the magnitude of the chi square value.
Assuming this finding to be based on a simple random sample of 800 Stooge fans who have a favorite Stooge, construct and interpret the 95% confidence interval for the population proportion whose favorite Stooge is Moe.
The best places in the United States to be a job seeker are state capitals and university towns, which are claimed to have jobless rates below the national.
suppose x y and c represent the length width and perimeter of a flat rectangular sheet metal part. note that x is a
According to data from the College Board, the mean quantitative SAT score for male college bound high school seniors is 530.
managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line
Below is a breakdown of the various expenditure items. Draw an appropriate chart to portray the data and summarize your findings in a brief report.
Found that 47% enjoy playing sports. would confidence in the results increase if the sample size were 3600 instead of 1100. why or why not?
Now we would like to evaluate regression equation for X using Y as independent variable.
What is the probability that a student will get an A OR a B?What is the probability that a student will get an A OR a B OR a C?
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