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Paying for Prescriptions A medical researcher wishes to determine if the way people pay for their medical prescriptions is distributed as follows: 60% personal funds, 25% insurance, 15% Medicare. A sample of 50 people found that 32 paid with their own money, 10 paid using insurance, and 8 paid using Medicare. At a = 0.05 is the assumption correct? Use the P-value method. What would be an implication of the results?
What is the standard deviation of expected returns for Stock X? For Stock Y?
I am charged with sampling expense report submissions for accuracy. We get 8000 T&E claims, and want to sample a subset making inferences about the population. I can probably get a good estimate of the populations' SD, how would i calculate required ..
question dr. patton is a professor of english. recently she counted the number of misspelled words in a group of
one-year returns of 223 mutual funds are grouped below.one-year returns of mutual fundsclass return in
Normally distributed about a mean value of 580 with a standard deviation of 60. Determine what percentage of the students scored higher than 750 on the exam.
Each customer has probability p of being a home owner independently of all other customers. Let Y be the number of home owners registered. Show that Y~Poisson.
Do a correlation and regression of hours worked in the last week on years of education. Then do this separately for women and for men. Interpret the correlation and the slope for the overall sample and then for women and for men separately. Is the..
How would you use the "margin of error" in estimating the percentage of all adults who think that Venetian blinds are the hardest to clean?
question a researcher in the west coast of the u.s. wants to estimate the amount of a newly discovered antibody in
Generate a relative frequency histogram using ten-point intervals to show the distribution of the scores.
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. Noise level is defined as "Low" (under 88 ..
Determine the value of correlation coefficient between these 2 variables?
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