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A pharmaceutical company conducted a study to evaluate the effect of an allergy relief medicine; 250 patients with symptoms that included itchy eyes and a skin rash received the new drug. The results of the study are follows. 90 of the patients treated experienced eye relief, 135 had their skin rashes cleared up, and 45 experienced relief of both itchy eyes and skin rash. What is the probability that a patient who takes the drug will experience relief of at least one of two symptoms?
Using the least-squares regression line, what would be the predicted number of visitors for a senior citizen whose level of activity was 5? How about a person who scored 18 on level of activity?
Use an alpha level of .01 and test the hypothesis that the two methods are producing the same mean.
If the coefficient of correlation is 0.4, the percentage of variation in the dependent variable explained by the variation in the independent variable
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
An experiment is designed to test the effectiveness of a specific type of gender selection process, using 15 couples trying to have baby girls.
First explain what the Gini coefficient is and what hypothetical Gini values of 0 and 1 mean. Sort the data by the Gini coefficient in 2000 and look at the list of countries.
Compute the probability of receiving four calls in a five-minute interval of time. Compute the probability of receiving more than 10 calls in a five-minute interval of time.
If a randomly selected student has a score of 40, then how many standard deviations away from the mean is that student's score?
For a sample of 20 stations last Tuesday the correlation was .78. At the .01 significance level is the correlation in the population greater than 0? t= .78-20.00/.01SQRT 20=?
Conduct a hypothesis test. What is the p-value and how much evidence is there to conclude that the power plants cooling system is not working properly.
Follow the conventions as described in the general guidelines for writing up Special Problems.
Is there a difference in the mean allowances nationally and the mean allowances in northwestern Ohio for nine-year-olds?
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