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Researchers wanted to determine if pesticide Z was effective at killing grasshoppers that typically invade cornfields. Two ten-acre cornfields located 1 mile apart were chosen. The cornfield to the west was sprayed only with water. The cornfield on the east received the same amount of water with a 10% solution of pesticide Z. Samples of the numbers of grasshoppers in the field were made every week for 10 weeks. They found that the number of grasshoppers doubled after ten weeks in the west field treated only with water. They also found that the number of grasshoppers declined by 50% after 10 weeks in the East field treated with water and pesticide Z. Which field was the control group?
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Researchers wanted to determine if pesticide Z was effective at killing grasshoppers that typically...
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