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1. Researchers are studying the absorption of two drugs into the bloodstream. Each drug is to be injected at three dosages. There are 24 people in the study, and they are randomly divided into six groups. Each of the six groups is randomly assigned to a different drug and dosage combination. After 30 minutes the concentration of drugs in a subject's blood is determined. Which of the following is correct?
A. The type of drug is a factor.B. The dosage of the drug is a factor.C. Both answers are correct.
2. The administration at a large state university is interested in getting the opinions of students on a proposed instructional fee for use of computer labs on campus. They select a simple random sample of 50 freshmen, 50 sophomores, 50 juniors, and 50 seniors. This is an example of
A. a systematic sample.B. a stratified random sample.C. a simple random sample.
3. Two amateur gardeners are interested in comparing the yields of two varieties of tomatoes. They each have small backyard gardens. Each gardener is going to plant three plants of each variety in his garden. The first gardener will select six small areas in his garden for planting, then choose three of these at random for the three plants of the first variety and then use the remaining three for the second variety. The second gardener will follow the same procedure with his own randomization in his garden. At the end of the growing season they will compare the yields of the two varieties. In this example the gardens are
A. a lurking variable.B. the explanatory variable.C. blocks.
All but one of the following statements contain a blunder. Which one does not contain a blunder
Determine whether the method of delivering teaching influences adherence with antiretroviral therapy.
A sample of 160 workers in the downtown area classified each worker by race. A bar graph of the results is given below, but the bar for black workers in the graph below has been omitted.
A teacher gave a 25 question multiple choice test. After scoring the tests, she computed a mean and standard deviation of the scores. The standard deviation was 0. Based on this information
Which of the following measures only the strength of a relationship?
A survey of college students collected information on several variables: Distance from Home, Age, Major, Gender, and Class. The variable Major is
Compute descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Compute the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which..
Prepare a power curve for this decision rule
Using the Census data, the OH Registry of Motor Vehicles reveal the subsequent about the Autos owned by the 10 families residing in Smallville.
For each of the 50 states and Washington, D.C., a number of statistics related to education are available for 1992
Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
Examined the effect of body position on blood pressure
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