Examlex
What is the difference between a positive correlation and a negative correlation? List some specific variables that you predict would be positively correlated,and variables that would be negatively correlated,with alcohol consumption by college students.
Null Hypothesis
The hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.
Significance Level
The probability of rejecting the null hypothesis in a statistical test when it is actually true, typically denoted by alpha (α), used as a threshold to gauge the strength of the evidence against the null hypothesis.
Test Statistic
A statistic calculated from sample data that is used in a hypothesis test to decide whether to reject the null hypothesis.
Sample Proportion
The ratio of members within a sample that possess a particular trait or characteristic, relative to the total sample size.
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