Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

yashar806

  • one year ago

A variable X follows a normal distribution with mean 10 and standard deviation 5. Another variable Y follows a normal distribution with mean 25 and standard deviation 10. The maximum height of the density curve for X is_______ (i) the maximum height for the density curve for Y , and the area under the density curve for X is__________ (ii) the area under the density curve for Y . (A) (i) greater than, (ii) less than (B) (i) less than, (ii) greater than (C) (i) equal to, (ii) equal to (D) (i) greater than, (ii) equal to (E) (i) less than, (ii) less than

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

    there is something missing from your question

  2. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    no its the actual question

  3. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    1 Attachment
  4. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    check that one

  5. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    are u there?

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

    you have to compair the standard deviations of each curve, remember that the sum of areas under each curve is one

  7. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    but , how ? could you explain it?

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

    |dw:1363240984062:dw|

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

    theses are two normal curves with the same mean , but different std.div

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

    the both have the same area ,; the sum of densities is one

  11. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    there are not same mean?

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

    can you tell be which curve has the greatest std. div , the red or black curve

  13. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    red?

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

    right , because less of the red is as close the mean as the black

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

    now if the means are different will this effect which is taller ?

  16. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    no

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

    right , the maximun height of the curve is only dependent of the std.div

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

    So Y has a std.div of 10 and X has a std.div of 5

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

    something like this |dw:1363241494740:dw|

  20. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so x has higher density curve ?

  21. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    and the area under the density curve for X is less then (ii) the area under the density curve for Y .

  22. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    is that righ?

  23. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    hello?

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

    x has higher density ✓

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

    remember that the area under each density curve must sum to one

  26. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so its same

  27. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    euqal

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

    yerh

  29. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    thank you so much

  30. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i got it

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

    does it make senses now?

  32. yashar806
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes thanks

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

    cool

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

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy

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.