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anonymous

  • one year ago

help please! :)

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  1. anonymous
    • one year ago
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    @welshfella

  2. anonymous
    • one year ago
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    There are 1,300 students in the school. Based on the sample proportion, how many students in the school would be expected to play indoor games for at least four hours every week? 546 598 702 1,248

  3. welshfella
    • one year ago
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    i've no idea on this one

  4. Michele_Laino
    • one year ago
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    we need to know the sample proportion

  5. anonymous
    • one year ago
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    ok then

  6. Michele_Laino
    • one year ago
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    it is a missing data

  7. anonymous
    • one year ago
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    ok

  8. Michele_Laino
    • one year ago
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    do you know what is the sample proportion?

  9. anonymous
    • one year ago
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    no

  10. Michele_Laino
    • one year ago
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    please check the complete text of your exercise

  11. anonymous
    • one year ago
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    is it 1,300

  12. Michele_Laino
    • one year ago
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    1,330 is the total number of the students

  13. Michele_Laino
    • one year ago
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    1,300*

  14. anonymous
    • one year ago
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    umm.. 1300 x 7 ?

  15. Michele_Laino
    • one year ago
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    the sample proportion, is a positive number and less than 1

  16. anonymous
    • one year ago
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    0

  17. Michele_Laino
    • one year ago
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    no, zero can not be, since your options are all different from zero

  18. anonymous
    • one year ago
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    so 1?

  19. Michele_Laino
    • one year ago
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    the sample proportion has to be a data of your problem

  20. anonymous
    • one year ago
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    oh sorry let me show you the whole problem :)

  21. Michele_Laino
    • one year ago
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    ok!

  22. anonymous
    • one year ago
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  23. Michele_Laino
    • one year ago
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    the requested sample proportion is: \[\Large \frac{{42}}{{42 + 52 + 4 + 2}} = ...?\]

  24. Michele_Laino
    • one year ago
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    please continue

  25. anonymous
    • one year ago
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    is it 59

  26. Michele_Laino
    • one year ago
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    \[\Large \frac{{42}}{{42 + 52 + 4 + 2}} = \frac{{42}}{{100}} = ...?\]

  27. anonymous
    • one year ago
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    21/50

  28. Michele_Laino
    • one year ago
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    ok! so the requested number, is: \[\Large 1300 \cdot \frac{{21}}{{50}} = ...?\]

  29. anonymous
    • one year ago
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    546!

  30. Michele_Laino
    • one year ago
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    yes!

  31. anonymous
    • one year ago
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    Ivy has 4 tiles with pictures of plants and 5 tiles with pictures of animals. Ivy keeps all the tiles on a mat with the pictures hidden and mixes them up. She then turns one tile face up and finds the picture of a plant on it. She removes this tile from the mat and turns over another tile without looking. What is the probability that the second tile that Ivy turns over has a plant on it? 37.5% 44.4% 60.0% 80.0%

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