A student conducted an experiment to determine if listening to different types of music would affect pulse rate. She thought that pulse rate would change with different types of music. Each person participating in her experiment listened to seven different selections of music for 30 seconds each. The pulse rates were taken after each 30-second interval of music. Based on her experiment, the student concluded that a personâs pulse rate changed when listening to different types of music. The component missing from this experiment is a (1) prediction (2) hypothesis (3) control group (4) research plan
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