Examlex
A researcher wants to test the effect of alcohol on driving performance. Participants first drive through an obstacle course before drinking any alcohol. The participants then drink 8 ounces of alcohol and drive the course again. After each trial, the number of traffic cones hit is recorded. The researcher finds that the number of traffic cones hit is greater before rather than after the participants drank the alcohol. What may best account for the change in performance?
SJSU Freshmen
A specific group of first-year students at San Jose State University.
Average College Freshman
A hypothetical or statistical representation of an incoming college student based on average attributes or characteristics.
Z-test
A Z-test is a statistical test used to determine whether two population means are different when the variances are known and the sample size is large.
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