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Matched pairs and independent data sets.
1. While is it important to have matched pairs rather than two independent sets of data?
2. Give an instance of when you would just want to have a correlation between two sets of data.
Statistics and Probability, Statistics
1. What are the four basic goals of behavioral research? 2. Distinguish between basic and applied research. In what ways are basic and applied research interdependent?
1. If the independent variable has absolutely no effect on the dependent variable, will the means of the experimental conditions be the same? Why or why not? 2. An ANOVA for a one-way design partitions the total variance ...
Three different brands of pain relief medication are available for minor aches and pains. It is of interest to know whether the mean time to relieve the pain differs from brand to brand. To find out, twelve individuals w ...
Assignment- Data: Description, Collection, and Sampling 1. A study was conducted of the 12-month earnings per share for two categories of airline companies, with the result shown in the chart below. Based on the data, wh ...
At a university, the average cost of books per student has been $400 per student per semester. The Dean of Students believes that the costs are increasing and that the average is now greater than $400. He surveys a sampl ...
1. What does the error of estimation tell us about the results of a study conducted using probability sampling? 2. What happens to the error of estimation as one's sample size increases?
1. Why are psychologists sometimes interested in epidemiology? 2. Why do researchers use probability rather than nonprobability samples when doing descriptive research?
It is estimated that 89% of senior citizens suffer from sleep disorders and 8% suffer from anxiety. Moreover, 5% of senior citizens suffer from both sleep disorders and anxiety. (a) Given that a senior citizen suffers fr ...
The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.3 inches. What is the probability that average length of a steel sheet from a sa ...
A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows: Student Anxiety Scores Study Hours 5 1 10 6 5 2 11 8 12 5 4 1 3 4 2 6 6 5 1 2 Why is ...
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