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The table below gives data for the percentage area of a person's teeth coated with plaque (a colourless bacterial biofilm that forms on hard surfaces in the mouth) after using one of four different toothpastes for four successive fortnights.
(a) What analysis would you use for this design?
(b) Use a statistical package to analyse the data. Is there a significant difference among toothpastes?
(c) Use an a posteriori test to identify the most effective toothpaste(s). Which would you recommend?
(d) Are there any you would not recommend?
data from a psychology experiment were reported and analyzed in the american statistician may 2001. each student
Consider the first-order model equation in three quantitative independent variables
A researcher is measuring production levels in several plants, with the total number of 172 subjects in 5 plants. There are 2 outliers in the very low production area 1 more in the highest production area. Discuss possible reasons for outliers and..
questiona search the internet for the latest figures you can find on the age and sex of the australian population.b
the diameter of ball bearings produced in a manufacturing process can be explained using a uniformprobability
Their reactions toward others subsequent to the problem situations are judged for aggressiveness. Ratings of aggressive behavior are as follows:
Two bonus points for rigorously proving Xt and Xt+1 are not independent. Let Xt=1+et-0.5et-1, t=1,2,3,..., where et~IID N(0,2), variance of et is 2. Calculate the mean of Xt.
An experiment measures the number of particle emissions from a radioactive substance.
Question: Why is the range a fairly unstable measure of the dispersion of scores in a distribution?
Prepare a list of at least three job-related assets that you have and explain why and how these qualities would be useful to a potential employer.
Batting averages. Suppose that a baseball player's long-run batting average (number of hits per time at bat) is 300. Assuming that each time at bat yields.
Provide an example of three events that would be mutually exclusive. Are these events also exhaustive? Then, give an example of three events that would be exhaustive. Are these exhaustive events also mutually exclusive?
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