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According to a study 7% of the population has lung disease. Of those having lung disease, 90% are smokers. Of those not having lung disease, 25.3% are smokers. Determine the probability that a randomly selected smoker has lung disease.
Describe the chi-square test of independence. How is this test different from the chi-square goodness-of-fit test? Are the assumptions underlying each of these tests the same?
In this problem set you will get some practice performing a linear regression analysis. If you use Statdisk or Excel to perform any portion of these analyses, please include the results, label them, and refer to them accordingly in your interpreta..
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..
A normal distributed population has a mean of 250 pounds and a standard deviation of 10 pounds. Given n = 20, what is the probability that this sample will have a mean value between 245 and 255 pounds?
As part of a long-term study of individuals 65 years of age or older, sociologists and physicians at the Wentworth Medical Center in upstate New York conducted a study to investigate the relationship between geographic location and depression.
Consider the following estimated regression equation, based on 10 observations.
Draw the suitable 2x2 table, compute and interpret suitable measure of association.
A new teaching tool developed by the Allied Health department is claimed to help 68% of students learn at a faster pace. State the null and alternate hypothesis if:
The store manager is under impression that his sales people do more business if they score higher on the social skills test which was administered this year. 5 victims were selected at random. Below, the results are X =test score, Y =weekly sales ..
If it has an emergency locator, what is the probability that it will not be discovered? If it does not have an emergency locator, what is the probability that it will be discovered?
At the 5% significance level, if the sample proportion is .45, and the standard error of the sample proportion is .035, the appropriate conclusion would be:
Construct a stem-and leaf display for the data set? Construct a box plot for the data set? Draw conclusions about the data (e.g. are there any outliers, etc, etc.).
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