Question: In Chapter 1, we discussed Lee Salks experiment in which he exposed one group of infants to the sound of a heartbeat and compared their

In Chapter 1, we discussed Lee Salk’s experiment in which he exposed one group of infants to the sound of a heartbeat and compared their weight gain to that of a group not exposed. Do you think it would be easier to discover a difference in weight gain between the group exposed to the heartbeat and the “control group” if there were a lot of natural variability among babies, or if there were only a little? Explain.

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