Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

riplang Group Title

Anybody know about z scores?

  • 3 years ago
  • 3 years ago

  • This Question is Closed
  1. 140986 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    http://www.youtube.com/watch?v=1xhCL5m4nI0

    • 3 years ago
  2. Zarkon Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I'm sure there are plenty of people here that know about z-scores. Do you have a particular question?

    • 3 years ago
  3. riplang Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Can you have the same z score in the same set of data? I'm thinking yes because what if you have the same number more than once but not sure

    • 3 years ago
  4. abtrehearn Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    If you know the mean and standard deviation, then you can plug them into \[z = (x - \mu)/\sigma,\] wnere mu is the mean and sigma is the standard deviation. Then the probability distribution in x becomes the standard normal distribution in z.

    • 3 years ago
  5. abtrehearn Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    If you are given a set of data, you can get their sample mean and sample variance, using the formula for a discrete set of data.

    • 3 years ago
  6. abtrehearn Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    If the number of data points is at least thiryt, then the normal approximation to distribution due to the data will be a good approximation.

    • 3 years ago
    • Attachments:

See more questions >>>

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.