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anonymous

  • one year ago

I promise a FAN AND A MEDAL!!!!!! Sarah is testing different types of planting soil to determine which type is most effective in growing blueberry bushes. She purchases 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

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  1. anonymous
    • one year ago
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    what are the options?

  2. Vocaloid
    • one year ago
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    it says that she watered the brand B plant every single day while she only watered the brand A plant every other day - if she wants to compare how Brand A and Brand B are different, she needs to give each plant the same amount of water (this process is called "controlling for variables")

  3. anonymous
    • one year ago
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    so her conclusion is not valid because she needs to give each plant the same amount of water

  4. Vocaloid
    • one year ago
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    yeah, pretty much

  5. anonymous
    • one year ago
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    can you help me with another question

  6. Vocaloid
    • one year ago
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    sure

  7. anonymous
    • one year ago
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    Julia enjoys shooting paper balls into the wastebasket across her office. She misses the first shot 50% of the time. When she misses on the first shot, she misses the second shot 20% of the time. What is the probability of missing two shots in a row

  8. Vocaloid
    • one year ago
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    probability of missing two shots = (probability of missing first shot)*(probability of missing second shot) = (0.5)*0.2

  9. anonymous
    • one year ago
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    0.1 or 10%

  10. Vocaloid
    • one year ago
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    excellent, good job

  11. anonymous
    • one year ago
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    169 is the square of 13

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