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anonymous

  • one year ago

Riley is testing how quickly sugar water freezes. He adds sugar water to one ice tray and plain water to another ice tray. He places each tray in the freezer and records the time when each one starts to freeze. What is the treatment in this experiment? Water Freezer Ice tray Sugar

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  1. exoticinspirit
    • one year ago
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    what do you think?

  2. anonymous
    • one year ago
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    Freezer

  3. anonymous
    • one year ago
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    @ExoticInspirit Do u know this?

  4. exoticinspirit
    • one year ago
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    oh sorry i thin the treatment is sugar because the control group would be water

  5. exoticinspirit
    • one year ago
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    think*

  6. anonymous
    • one year ago
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    Now you tell me once I finished and got it wrong

  7. exoticinspirit
    • one year ago
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    oh sorry didn't know you were doing a test or something my bad..

  8. anonymous
    • one year ago
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    ok what about this one n a sample of 200 households, the mean number of hours spent on social networking sites during the month of January was 55 hours. In a much larger study, the standard deviation was determined to be 7 hours. Assume the population standard deviation is the same. What is the 99% confidence interval for the mean hours devoted to social networking in January? The 99% confidence interval ranges from 53.73 to 56.27 hours. The 99% confidence interval ranges from 7 to 55 hours. The 99% confidence interval ranges from 54.51 to 55.49. The 99% confidence interval ranges from 55 to 60 hours.

  9. exoticinspirit
    • one year ago
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    but you know the right answer now right :D

  10. Photon336
    • one year ago
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    FYI If you dissolve any solute in water that would lower the freezing point so the time it takes the sugar/water to freeze will be longer than the regular water b/c this is the concept of collagative properties which depend on the amount of solute you dissolve in a solvent.

  11. anonymous
    • one year ago
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    Can you solve this one @ExoticInspirit

  12. Photon336
    • one year ago
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    The treatment is sugar

  13. exoticinspirit
    • one year ago
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    yeah one sec

  14. exoticinspirit
    • one year ago
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    if its the same wouldnt it be the second choice

  15. exoticinspirit
    • one year ago
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    @acxbox22 @asmagul

  16. exoticinspirit
    • one year ago
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    i dont know but is there an equation to find the confidence interval

  17. exoticinspirit
    • one year ago
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    because i've never done this kind of problem yet

  18. exoticinspirit
    • one year ago
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    whaqt are the answer choices i think i got it

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