A researcher is conducting an experiment to determine support for the feminist movement. The experimental procedure consists of playing a tape recording of a meeting of a feminist organization for a group of subjects and then comparing their attitudes with those of a matched control group of subjects who are not exposed to the tape. At the conclusion of the experiment, the researcher is amazed to find that the tape recording apparently made no difference in attitude toward the feminist movement. Check this result in the following table:

The researcher then decides to take into account the sex of the subjects and obtains the following tables:

Did the tape recording have an effect on attitude toward the feminist movement? Explain your answer.

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Listened to Tape Recording Attitude toward Feminist Movement Nor favorable Favorable No 40 40 Yes 39 41 Men Women Listened to Ta Recording Listened to Ta Recording Attitude toward Attitude toward Feminist Movement Not favorable Favorable No 21 19 Yes 24 16 Feminist Movement Not favorable Favorable No 19 21 Yes 15 25