An administrator in charge of residential life services recently conducted a survey of undergraduate college students at a small university. A random sample of 300 students was selected from each class level (freshman, sophomore, junior, or senior). Each student was asked to complete and return a short questionnaire on the quality of campus residences. Some students returned the questionnaire; some did not. This is summarized in the table below. How many different marginal distributions could be plotted from these data?
A)0
B)1
C)2
D)None of the answer options is correct.

Question

An administrator in charge of residential life services recently conducted a survey of undergraduate college students at a small university. A random sample of 300 students was selected from each class level (freshman, sophomore, junior, or senior). Each student was asked to complete and return a short questionnaire on the quality of campus residences. Some students returned the questionnaire; some did not. This is summarized in the table below.  How many different marginal distributions could be plotted from these data?
A)0 
B)1 
C)2 
D)None of the answer options is correct.

Quizplus · Accepted Answer

There are two variables in this study: class level and response rate. A marginal distribution can be created for each variable, resulting in two different marginal distributions.

An Administrator in Charge of Residential Life Services Recently Conducted