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anonymous

  • one year ago

Below are the data collected from two random samples of 500 American adults on the number of hours they work per day (rounded to the nearest hour): Ryan concludes that adults spend a mean of 8 hours working each day. Malia thinks the mean is 9 hours. Who is correct—Ryan or Malia? Explain your answer in two or three sentences

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    step by step help plz

  3. anonymous
    • one year ago
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    @Loser66 can you help me plz

  4. anonymous
    • one year ago
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    40*500/8?

  5. anonymous
    • one year ago
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    @Loser66 am i going in the right direction?

  6. Loser66
    • one year ago
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    Honestly, I don't know. @jtvatsim

  7. Loser66
    • one year ago
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    I hate stats!!

  8. anonymous
    • one year ago
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    @Loser66 thanks for being honest. hope @jtvatsim can help

  9. jtvatsim
    • one year ago
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    Hmm... looking at it...

  10. anonymous
    • one year ago
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    @jtvatsim ok

  11. Loser66
    • one year ago
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    @jtvatsim you get 100, right? which is not the answer the Asker wants, right? By definition of mean values, it is 500/5 =100, But they interpret the problem on the way I don't get!!

  12. jtvatsim
    • one year ago
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    I'm building an excel table right now to speed up the calculations... I'll let you know what I get. The question is phrased a little unclearly.

  13. Loser66
    • one year ago
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    If we work with the hours of A and B, then mean is 100 which is not the answer for both Ryan and Maya But if we work on the hours itself like (6+7+8+9+10)/ 5 =8 But it is .....so...... dumb to interpret the problem that way.hahaha..... I feel so dumb now.

  14. jtvatsim
    • one year ago
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    I'm trying to wrap my head around it still, I'm thinking we need to multiply the hours by the number of people who worked those hours... Not sure... still thinking...

  15. Loser66
    • one year ago
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    ok, let's get help. Let me tag my master. @oldrin.bataku

  16. anonymous
    • one year ago
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    @Loser66 ok

  17. anonymous
    • one year ago
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    can it be 6(60)+7(90)+8(145)+9(150)+10(55)

  18. Loser66
    • one year ago
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    then? divided by what??

  19. Loser66
    • one year ago
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    and why do you just pick sample A to work out? why not B?

  20. anonymous
    • one year ago
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    starting from the top..just guessing

  21. jtvatsim
    • one year ago
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    I actually like that line of thought. It seems reasonable... for the following reasons:

  22. jtvatsim
    • one year ago
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    We are trying to figure out the "Average number of hours worked". The best way to do this is to first determine the "Total number of hours worked" and then divide this by the number of people we have. This will give us the average number of hours worked for one person.

  23. jtvatsim
    • one year ago
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    Now, Loser66 raises a good point. Do we calculated the average for each sample separately? Or should we combine them? I argue that we should combine them, but either way, it seems like you will get similar answers.

  24. anonymous
    • one year ago
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    if we combined them we won't determined who is correct

  25. jtvatsim
    • one year ago
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    Perhaps, I guess that is assuming that Ryan uses one sample and Malia uses the other. I feel that they are both looking at the same data. But since you have probably worked on other problems in the class, you might have a better feel for what the assignments ask for.

  26. jtvatsim
    • one year ago
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    Either way, we can gather the data and then decide what we will do with it.

  27. jtvatsim
    • one year ago
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    Sample A Data: Total hours worked: 4050 hrs Total people sampled: 500 people. Sample B Data: Total hours worked: 4055 hrs Total people sampled: 500 people

  28. anonymous
    • one year ago
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    they check the same data

  29. anonymous
    • one year ago
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    8.1

  30. anonymous
    • one year ago
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    which is both samples; I think the purpose of the question is that you might not be able to just add them all together as a single sample since there's no reason to believe the random samples are not correlated in some unseen way (through overlapping, sampling some of the same people)

  31. anonymous
    • one year ago
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    @oldrin.bataku because both worked out to be 8.1 therefore Ryan is correct?

  32. Loser66
    • one year ago
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    @steffie84 what is your grade? which course it is?

  33. anonymous
    • one year ago
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    @Loser66 7th am doing virtual school

  34. Loser66
    • one year ago
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    WWWWWWWWWWat?? 7th grade!! shame on me!!! I don't know how to solve the 7th grade problem. hehehe.....

  35. anonymous
    • one year ago
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    @Loser66 haha no shame there

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