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iGreen

  • one year ago

Inferences from Two Samples

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  1. iGreen
    • one year ago
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  2. iGreen
    • one year ago
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    Would this be Proportion?

  3. iGreen
    • one year ago
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    @amistre64 @jim_thompson5910 @jdoe0001 @SolomonZelman

  4. amistre64
    • one year ago
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    what would you define as the proportions?

  5. amistre64
    • one year ago
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    a proportion is something like: this many, out of a sample of this many ... do you see anything in the information that tells us that sort of detail?

  6. iGreen
    • one year ago
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    Basically, I'm asking if it would be A(to the first question).

  7. iGreen
    • one year ago
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    No, I didn't think it would be.

  8. iGreen
    • one year ago
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    So A is out..

  9. amistre64
    • one year ago
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    i believe A is out yes. average and mean tend to be synonyms

  10. iGreen
    • one year ago
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    Yep

  11. amistre64
    • one year ago
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    if out of 64 students, the average score was 82 ... this is not telling us how many of the students got an 82 .. x/64 would be a proportion setup

  12. amistre64
    • one year ago
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    i dont know what a paired difference is ... so my best guess is that A is not it :)

  13. iGreen
    • one year ago
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    Well, to do C I would also need the Standard Deviation

  14. amistre64
    • one year ago
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    pop sds are given .. so B is plausible

  15. amistre64
    • one year ago
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    T test uses the sample deviations

  16. amistre64
    • one year ago
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    can you define what a paired differences is?

  17. iGreen
    • one year ago
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    Well, if we do Paired Differences, we need Data..so I think that's out too.

  18. iGreen
    • one year ago
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    Like a table of values for each of the samples..

  19. iGreen
    • one year ago
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    Which is not given..so D should be out.

  20. jim_thompson5910
    • one year ago
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    paired differences would only be used if both sample sizes are the same and the samples are dependent (connected) somehow eg: before and after tests

  21. amistre64
    • one year ago
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    i think paired data tends to use the same sample group, and compares it like a before and after

  22. amistre64
    • one year ago
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    yeah ..

  23. amistre64
    • one year ago
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    so all others being equal ... i know what id guess at :)

  24. iGreen
    • one year ago
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    Ah..okay, thanks a bunch guys! :)

  25. amistre64
    • one year ago
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    good luck ;)

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