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

rightnowselene Group Title

d). the confidence level c represents the proportion of all (fixed) intervals that would contain the parameter if we repeated the process many, many times.

  • 6 months ago
  • 6 months ago

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

    I'm having trouble understanding this question: Discuss the statements in the context of what we actually mean by a confidence interval. a). Once the endpoints of the confidence interval are numerically fixed, then the parameter in question (either mu or p) does or does not fall inside the "fixed" interval. B). A given fixed interval either does or does not contain the parameter mu or p; therefore the probablity is 1 or 0 that the parameter is in the interval. C). Nontrival probability statements can be made only about variables, not constants.

    • 6 months ago
  2. carpark Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    This might be too lateto help, but here goes cuz I love this stuff! Think of the confidence interval as a net of a fixed size trying to capture the true (and unknowable) mu. Statement D is saying that if a net is made with these numeric methods and swung a bazillion times, we can expect 80% (for example) of the swings to catch the true mu. Statement A is saying that once we set the size of the net and swing, we either caught the true mu or we didn't. (We have no way of knowing if it's in there.) Statement B is another way of saying Statement A. If we caught mu, there is a 100% chance that it's in the net If we missed it, there is 0 probability that it is in the net. (But we have no way of knowing if it's in or out.) I think Statement C is saying something similar to Statement B. To switch images, let's say you roll a 5 with a die. What is the probability that it is a 5? 100% !!! What is the probability that it is not a 5? 0%. Only unknowns have probabilities worth discussing. BEFORE you roll, you have a 1/6 chance of getting a 5. Once you have rolled, the only options are 100% or 0%.

    • 6 months 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.