Twelve family pets have been randomly placed into two groups. Group 1 receives the standard version of a flea powder, while group 2 receives a modified formula.
Four days following treatment, researchers count the number of fleas collected from each pet during a 2-minute period. The results are shown below. At the 0.025 level, is the new formula more effective than the old?
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Number of fleas after old formula:
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17
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16
|
17
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4
|
8
|
15
|
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Number of fleas after new formula:
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6
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1
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1
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2
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7
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5
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