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natta225 [31]
3 years ago
10

Sarah is testing different types of planting soil to determine which type is most effective in growing blueberry bushes. She pur

chases two different brands of planting soil from a local store. Sarah applies Brand A to 1 area of the yard and Brand B to another area of the yard, both of which receive full sunlight. She waters the area with Brand B daily; she waters the area with Brand A every other day. At the end of the study, Sarah concludes Brand B is more effective in growing blueberry bushes. Why is her conclusion not valid?
Mathematics
2 answers:
Dmitriy789 [7]3 years ago
8 0
It is not valid because she watered brand B every day, but brand A every other day. In order to get valid results, she had to water the area the same amount.
deff fn [24]3 years ago
5 0
 Her conclusion is not valid because she needs to give each plant the same amount of water.
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