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echeng
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Trimmed Mean
Removing the top and bottom 5%
Type II Error
Not rejecting the null hypothesis when false
Type I error
Rejecting the null hypothesis when it is true
Independent Group
Samples from different groups that has no relationship between the people or objects in the different groups
Lurking Variable
Variable that affects the response you are studying but is not included in your analysis
Standard Error
How much the sample means vary in repeated samples of the same size from the same population
Alternative Hypothesis
Situation in which is null hypothesis is false
Levene Test, t-test p-value <0.05
Examine the t-test results with equal variances not assume
Levene Test, t-test p-value >0.05
Examine the t-test results with equal variances assumed
Sampling Distribution
One distribution randomly selected from many possible distributions
Constant Variance
Another way of saying that the population variance is the same for all cells
Sample
Subset of a population
Parameter
Some numeric characteristics of a population such as the mean
Independent
Menas that knowing the value of one of the variables for a case tells you nothing abut the value of another variable
Least-Square Regression Line
Means that of all the possible lines that can be drawn on the plot, line B has the smallest sum of squared vertical distances between the points and the line