5. 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 or not they would volunteer to participate. The researcher also obtains an IQ score for each student and classifies the students into high, medium, and low IQ groups. Do the following data indicate a significant relationship between IQ and volunteering?

IQ

High Medium Low Total

Volunteer 43 73 34 150

Not Volunteer 7 27 16 50

Total 50 100 50

Conduct a hypothesis test using the following steps. Set alpha = .05

5A. Step 1: State the null hypothesis in words.

(1 point)

5B. Step 2: Set up the criteria for making the decision. That is, find the critical value.

(1 point)

5C. Step 3: Summarize the data into the appropriate test-statistic.

(3 points)

5D. Step 4: Evaluate the null hypothesis (circle one)

REJECT FAIL TO REJECT (1 point)

5E. Step 5: State your conclusion in words.

(1 point)