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Example Questions
Example Question #1 : How To Find The T Distribution
The purpose of the t test is to do which of the following?
Compare the significance of multiple variables.
Describe the variance within a population.
Compare the means of separate populations.
Determine the ability of one variable to predict another.
Test the relationship between five or more variables.
Compare the means of separate populations.
A t test is used to compare the means of different groups. A t test score describes the likelihood that the difference in means between two groups is due to chance. The null hypothesis assumes the two sets are equal however, one can reject the null hypothesis with a p value within a particular confidence level.
Example Question #121 : Statistical Patterns And Random Phenomena
follows a chi-squared distribution with
degrees of freedom and
through
are independent standard normal variables.
If , what is
?
Use the fact that the sum of squared standard and independent normal variables follows a chi-squared distribution with
degrees of freedom.
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