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Q1) Can you describe a data set for which one would one would prefer to use the median rather than the mean?
Q2) Can you think of a situation for which the mean would be preferred to the median and the mode?
Q3) Why do we not always use the median?
Q4) Why is the mode not a very good measure for quantitative data?
An advertisement for Cold-Ex claims an 80 percent end-of-treatment clinical success rate for the treatment of flu. Twelve flu patients are given Cold-Ex and are later checked to see if the treatment was successful. Let's assume that the claim ..
A discrete probability is the likelihood that certain discrete data will occur. What is discrete data? Consider a scenario where you could use a discrete probability to predict the likelihood of an event.
Once R is selected, the sum is compounded instantaneously for a year so that X= 50000 e^R dollars is the amount at the end of that year. Find the distribution function and the p.d.f. of X.
Discuss the issue of statistical power in non-parametric tests (as compared to their parametric counterparts). Which type tends to be more powerful? Why?
Scores range from 0 to 200. The mean score for students who live on the west coast is about 115. Construct a 90% confidence interval for the unknown mean of the students on the east coast.
The least squares simple linear regression line minimizes the sum of the vertical deviations between the line and the data points.
A sample of 30 cookies is taken to test the claim that each cookie contains at least 9 chocolate chips. The average number of chocolate chips per cookie in the sample was 7.8 with a standard deviation of 3.
What factors are most important in determining a research design? The response should be relevant to particular area of interest.
The regional tupperware dealers earned these commissions last month: what was the mean commision earned? round your answers to the nearest cents.
Using the EMV criteria (you wish to maximize expected profits in this case) determine what course of action that Optel should take. Make sure to state the best strategy in words.
a fast-food restaurant sells hamburgers and chicken sandwiches. on a typical weekday the demand for hamburgers is
After a one-hour standoff, what is the likelihood (in percentages) that the negotiation will end successfully? After four hours? After eight hours?
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