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We wish to measure the average prevalence of a chemical in the population. The measurement is done by a blood test. We expect the standard deviation in the population to be about 300ppm. If we want to know the average to within 200ppm with a confidence of 95%, how many people do we need to test?
"Why would students be asked to take a statistics if they may never see a math problem in their job in the future? I have my own opinions on the matter, but lets see what the rest of you think?
Write a 300-500 word essay and describe the following terms: Central Limit Theorem and its application. Confidence intervals using sample means and sample proportions
If the mean μ does not differ significantly from 5.5 (that is, if the null hypothesis is true), then the probability of obtaining a sample mean y as far or farther from 5.5 than 5.4 is .1034.
Calculate the Measures of Center and Measures of Variation for the following data set representing the chest size of 20 bears in inches.
What is frequency distribution? What is a bar graph? What are percentile rankings? What is a histogram? What is a pie chart? When would a researcher use a bar graph, histogram, percentile rankings, or pie chart? Name examples that we see of the..
Law school courses often have assigned seating to facilitate the Socratic method. Suppose that there are 100 first-year law students, and each takes the same.
To find out whether living next to high-voltage power lines increases your chance of getting cancer, researchers selected various homes at random.
a large manufacturing firm tests job applicants who recently graduated from college. the test scores are normally
a. Portland Co. is not subject to translation exposure since it has no foreign subsidiaries.
(a) Calculate the least-squares regression line for these data. (b) Plot the points and the least-squares regression line on the same graph.
1 let x paretoy. what is distribution for y ln x 1 ?2 if f x1x2 2exp -x1 - x2 for 0ltx1ltx2ltinfinity.find the
Antonia Martinez, who is running for the state senate, makes this statement: - What has Martinez told us about taxes, educational costs, and welfare?
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