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What is the relevance of Pearson's r? What does it tell you about the correlation between variables? What is one example of a null hypothesis and the research hypothesis that goes with it?
A study of cardiovascular risk factors compared heavy smokers, light smokers, and nonsmokers. Both men and women were included in the study and gender differences were also to be investigated. One of the variables measured was the heart rate after..
To test is there any significant difference among two proportions. The Damon family owns a large grape vineyard in western New York along Lake Erie.
The mean for a sample of n=16 scores has an expected value of 50. This sample was selected from a population with a mean of µ=50.
We have discussed two different methods for making statistical inferences such as developing interval estimates and conducting hypothesis tests. These methods are the "Critical Value Method" and the "P-Value Method".
In terms of the standard scores for both sections, the score of which section was better? What are the z-scores for both sections?
Explain what the coefficient of determination, R^2 (R-squared), measures. How is it related to the sample correlation coefficient?
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
In order to control costs, a company wishes to study the amount of money its sales force spends entertaining clients. The following is a random sample of six entertainment expenses (dinner costs for four people) from expense reports submitted by m..
Design a contingency table that will hold your data. What are your degrees of freedom and critical value at a 0.05 confidence level? You do not need data to answer this.
Do the sample data present sufficient evidence to reject the manufacture's claim? Test using a a=0.05. What is the p-value of the test.
In your own words, define epistemology and ontology. Why are these concepts important to the study of research? How might the concepts influence your future research?
When creating a 99% confidence interval for the true average difference in cholesterol levels by the drug, what is the margin of error?
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