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1. Two researchers are both interested in the relationship between caffeine consumption and activity level for elementary school children. Each obtains a sample of n = 20 children.
a. The first researcher interviews each child to determine the level of caffeine consumption. The researcher then records the level of activity for each child during a 30-minute session on the playground. Is this an experimental or a nonexperimental study? Explain your answer.
b. The second researcher separates the children into two roughly equivalent groups. The children in one group are given a drink containing 300 mg of caffeine and the other group gets a drink with no caffeine. The researcher then records the level of activity for each child during a 30-minute session on the playground. Is this an experimental or a nonexperimental study? Explain your answer.
Clinical trials play a vital role in testing and development of new drugs and medical devices. What are clinical trials? Explain the difference between controlled and uncontrolled trials.
A lack of awareness of cultural differences or the assumption by one cultural group that another is inferior often results in painful personal and social encounters. Apply this thesis to discuss how this lack of awareness affects the relationships ..
Article summarizing a study to compare a new drug to a standard drug and to a placebo - baseline characteristics are significantly different (at the 0.05 level of significance) between treatment groups
A medical researcher estimates that no more than 55% of the U.S. adults eat breakfast every day. In a random sample of 250 U.S. adults, 56.4% say that they eat breakfast every day.
How would you decide whether or not to drop the free telephone consultation service provided by your company's brand of computer software?
The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The standard deviation of the mileage is 5,000 miles.
A firm has tendered for two independent contracts. It estimates that it has probability 0.4 of obtaining contract A, and probability 0.1 of obtaining contract B. Find the probability that the firm:
What is the difference between expected value and mean? In other words, what would be difference between the expected value of something, as opposed to the mean of that something? And how do I know when I should be finding the expected value and n..
After the new advertising campaign was launched, a marketing study found that the mean spending for 300 respondents in the 18-34 age groups was $75.86, with a standard deviation of $50.90. Is there sufficient evidence to conclude that the advertis..
As your final writing assignment for this class, you will write a paper that analyzes a topic relevant to the relations between the medical and the social. Analyzing a complex topic means breaking it into smaller parts to understand it better.
A major study examined the relationship between cause of death (heart attack, cancer, stroke, accident, etc.) and age. A good way to graphically represent the relationship is with
in a survey of 1000 randomly selected adults in the united states participants were asked what their most favorite and
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