Stat 160 Prequiz over Section 10.1, 10.2, and 10.3



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1. In a completely randomized design, you do not have to worry about controlling other factors (non responses) that could influence the outcome of the experiment.

True
False
Only in weight reduction experiments
Only when you use a placebo
2. What is the best way to establish cause and effect?

Uncontrolled Experiments
Use of Covariates
Using a placebo
Controlled Experiments
3. Two population distributions are said to satisfy the location assumption if

The distributions are located at the same cite.
One distribution is much noisier than the other.
The ratio of their standard deviations is 2 to 1.
The distributions differ by at most a shift.
4. In a Randomized Paired Design, the variables that are analyzed are:

the covariates only.
placebos only.
differences in paired responses.
those that have psychotic tendencies.