# True Experimental Study

In a true experimental study, the subjects should be assigned to groups randomly. If this is not possible, and a researcher uses stratified sampling, the groups are sampled individual according to a _______________system based on the proportion of the subgroup in the population as a whole.

On a multiple choice test, there are five choices for each question. Only one of the five choices is correct. Find the mean expected for a 23 question test.

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In a true experimental study, the subjects should be assigned to groups randomly. If this is not possible, and a researcher uses stratified sampling, the ...

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On a multiple choice test, there are five choices for each question. Only one of the five choices is correct. The solution finds the mean expected for a 23 question test.