Research indicates that people who volunteer to participate in research studies tend to have higher intelligence than non-volunteers. To test this phenomenon, a researcher obtains a sample of 200 high school students. the students are given a description of a psychological research study and asked whether they would volunteer to participate. The researcher also obtains an IQ score for each student and classifies the students into the high, medium, and low IQ groups. Do the following data indicated a significant relationship between IQ and Volunteering? Test at the .05 level of significance.

IQ

High Medium Low

Volunteer 43 73 34 150

non-volunteer 7 27 16 50

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50 100 50