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pink.1d

  • one year ago

Choose a row and column and compare P(A | B) with P(B | A). Explain what each probability means in the context of the situation and data you collected.

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  1. pink.1d
    • one year ago
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    This is my graph

  2. pink.1d
    • one year ago
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    table***

  3. pink.1d
    • one year ago
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    Use social media regularly Don't use social media Younger than 18 16 4 Older than 18 11 9

  4. pink.1d
    • one year ago
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    @perl

  5. pink.1d
    • one year ago
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    also: Compare P(A∩B) with P(A∪B), and explain what each probability means in the context of the situation and data you collected. SAME TABLE posted above

  6. pink.1d
    • one year ago
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    @dan815 @iambatman @triciaal

  7. perl
    • one year ago
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    lets start with the first question

  8. pink.1d
    • one year ago
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    okay:)

  9. perl
    • one year ago
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    first find the totals http://prntscr.com/7cj8yl

  10. perl
    • one year ago
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    Let A = Use social media regularly Let B = Younger than 18 P( A | B) = 16/20 P(B|A) = 16/27

  11. pink.1d
    • one year ago
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    i understand up to now

  12. pink.1d
    • one year ago
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    i dont get what they mean when it says ' Explain what each probability means in the context of the situation and data you collected.' i dont know how to answer that. i know how to find the answer but i m not sure how to answer that

  13. perl
    • one year ago
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    P(A | B) means probability use social media regularly given that we only look at people who are younger than 18 http://prntscr.com/7cja04 Or another way to say it, of people who are younger than 18 what is probability that randomly selecting one uses social media

  14. perl
    • one year ago
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    so we only look at that top row

  15. pink.1d
    • one year ago
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    so the top row and 1s2 colum?

  16. pink.1d
    • one year ago
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    1st*

  17. pink.1d
    • one year ago
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    younger than 18 and use social media

  18. pink.1d
    • one year ago
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    @perl @perl @perl @perl dont leave

  19. pink.1d
    • one year ago
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    YAY ur back! :)

  20. perl
    • one year ago
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    right, top row and first colmun is P(A|B)

  21. perl
    • one year ago
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    P(A|B) corresponds to top row and first colmun also we can express it as P(A|B) =P(A∩B) / P(B)

  22. pink.1d
    • one year ago
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    what does p(b line a) mean. it means

  23. perl
    • one year ago
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    P(B|A) says to look in only first column, first row

  24. pink.1d
    • one year ago
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    so what exactly does that mean?

  25. pink.1d
    • one year ago
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    im confused

  26. pink.1d
    • one year ago
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    does it mean it all out of total

  27. perl
    • one year ago
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    If we define http://prntscr.com/7cjcnn P(B|A) says to look in only first column A P(A|B) says to look only in first row B

  28. pink.1d
    • one year ago
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    can you look over the answer I wrote?

  29. perl
    • one year ago
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    what did you write

  30. pink.1d
    • one year ago
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    P(B | A) means probability of those under 18 who use social media regularly out of the total people that use social media regularly

  31. pink.1d
    • one year ago
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    P(A | B) : This probability means means probability of those under 18 who use social media regularly out of all the people under 18

  32. perl
    • one year ago
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    do you agre that I defined A = "those who use social media regularly"

  33. pink.1d
    • one year ago
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    am i right?

  34. perl
    • one year ago
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    agree*

  35. pink.1d
    • one year ago
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    or wrong

  36. perl
    • one year ago
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    its kind of hard to say, its a bit confusing what you wrote for the second one

  37. pink.1d
    • one year ago
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    P(A | B) : This means probability of those under 18 who use social media regularly out of all the people under 18

  38. pink.1d
    • one year ago
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    i edited that

  39. pink.1d
    • one year ago
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    is the first one right?

  40. pink.1d
    • one year ago
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    @perl

  41. perl
    • one year ago
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    P(A|B): probability that a person who is younger than 18 uses social media regularly.

  42. perl
    • one year ago
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    P(B|A): Probability that a person who uses social media regularly is younger than 18.

  43. perl
    • one year ago
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    http://prntscr.com/7cjfig

  44. pink.1d
    • one year ago
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    @perl can you help me with the second one please?

  45. pink.1d
    • one year ago
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    NEVERMIND

  46. pink.1d
    • one year ago
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    THANKS FOR ALL THE HELP

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