A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Janet wanted to understand whether grade level had any relationship to their opinion on extending the school day. She surveyed some students and displayed the results in the table below: In favor Opposed Undecided Grade 9 4 2 8 Grade 10 7 11 8 Grade 11 14 15 9 Grade 12 11 5 10 Compare P(Grade 9 | opposed) with P(opposed | Grade 9).

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Answer choices P(Grade 9 | opposed) = P(opposed | Grade 9) P(Grade 9 | opposed) > P(opposed | Grade 9) P(Grade 9 | opposed) < P(opposed | Grade 9) There is not enough information.

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @mathmate

  3. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    to find P(Grade 9 | opposed) that says Given the opposed (so circle that whole column) how many are Grade 9. write down the fraction # in Grade 9 in the opposed column divided by the total number in the opposed column (all Grades)

  4. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    to find P(opposed | Grade 9). which means Given Grade 9 (i.e. circle the Grade 9 row) how many in that row are opposed? make the fraction # in Grade 9 who are opposed divided by total number in Grade 9 (add up all the numbers in that row)

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so it B @phi

  6. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    are you able to find P(Grade 9 | opposed) ? do you see the opposed column? what is the sum of that column?

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    33

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @phi

  9. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    and 2 out of the 33 are Grade 9 so the probability of Grade 9 given opposed is 2/33

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay i understand that

  11. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    now do P(opposed | Grade 9) we are "given Grade 9" what is the sum of numbers in Grade 9 ?

  12. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    14

  13. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    and how many of that 14 are "opposed" ? what is the fraction you should make?

  14. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    2/14

  15. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so now you have 2/33 2/14 which one is bigger ?

  16. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    2/14

  17. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so its c

  18. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so you want the relation that has the "big side" next to the 2/14 2/33 < 2/14

  19. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes, choice C

  20. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    alright thank you so much

  21. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.