Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

HereticHalloran

  • one year ago

The time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes. How much time should be given to complete the exam so that 90% of the students complete the exam in the allotted time?

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

    I understand that its a Probability Distribution problem, but I dont know which formula(s) to use to figure this out

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

    M the proper number of minutes to meat the criterion. \((M-70)/10 = Z_{90}\) Find the Z-value with 10% of the Normal Distribution in the right tail. Solve for M.

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

    You are awesome. Thank you.

  4. 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.