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Data for exercise: Decreases in body temperature (degrees Fahrenheit)
Group 1 (aspirin)
0.95
1.48
1.33
1.28
Group 2 (ibuprofen)
0.39
0.44
1.31
2.48
1.39
Group 3 (acetaminophen)
0.19
1.02
0.07
0.01
0.62
-0.39
This trial evaluated the fever reducing effects of three substances. Study subjects were adults seen in an emergency room with diagnosis of flu with body temperatures between 100.0 degrees F to 100.9 degree F. The three treatments aspirin, ibuprofen, and acetaminophen were assigned randomly to study subjects. Body temperatures were reevaluated 2 hours after administration of treatments. Display the above data with side-by-side box plots and calculate the mean and standard deviation of each group and describe what you find then produce an ANOVA for the problem. Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
A manufacturer of billiard balls is testing three additives to the basic plastic. Show the partial ANOVA table
Describe the sampling distribution of the sample proportion
Explain the logic of what you have done, writing as if you are speaking to someone who has never heard of correlation (but who does understand the mean, deviation scores, and hypothesis testing);
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.
Compute the probability that student eats at fast food restaurant 2 or more times per week?
What is the likelihood that none of the selected flights arrived within fifteen minutes of scheduled time?
For a t distribution with 16 degrees of freedom, find the area, or probability, in each region.
The lifetime of a 2-volt non-rechargeable battery in constant use has a Normal distribution with a mean of 516 hours and a standard deviation of 20 hours. The proportion of batteries with lifetimes exceeding 520 hours is approximately.
Suppose that the number of babies born during an hour at a hospital's maternity wing follows a Poisson distribution with a mean of 4 per hour.
Be sure the appropriate assumptions and conditions are satisfied before you proceed.
Based on surveys conducted in 1989 and 1999, a researcher compared the proportion of high school age females interested in a career in science in 1989 with the proportion in 1999. He concluded that the proportions were not significantly different ..
If the standard deviation of the amount of coffee dispensed is 0.4oz and the amount of coffee dispensed is normally distributed.
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