Results 1 to 2 of 2

Math Help - Sampling Distribution Question

  1. #1
    Newbie
    Joined
    Mar 2010
    Posts
    8

    Sampling Distribution Question

    Also having some trouble with this one:

    Suppose we assume that the temperatures of healthy humans is approximately normal with a mean of 98.6 degrees and a standard deviation of 0.8 degrees.

    (a) If 130 people are selected at random, what is the probability that the average temperature for these people is 98.25 degrees or lower?

    (b) Would you consider an average temperature of 98.25 degrees to be an unlikely occurrence, given that the true average temperature of healthy people os 98.6 degrees. Explain


    The answers:

    (a) ≈0
    (b) Yes; the mean value is 98.25, which is almost 5 standard deviations below the assumed mean of 98.6

    Any help will be greatly appreciated, as i am interested in how these answers are obtained.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Aug 2007
    From
    USA
    Posts
    3,110
    Thanks
    2
    1) Why is this in "Advanced"?

    2) What sort have you solved with less difficulty?

    3) \frac{98.25 - 98.6}{\frac{0.8}{\sqrt{130}}} = -5-ish.

    Now what?
    Last edited by TKHunny; April 26th 2010 at 07:52 PM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Easy sampling distribution question
    Posted in the Statistics Forum
    Replies: 2
    Last Post: October 22nd 2011, 10:47 AM
  2. sampling distribution question
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: July 21st 2011, 04:06 PM
  3. Replies: 3
    Last Post: July 5th 2011, 08:13 PM
  4. Sampling Distribution Question
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: August 15th 2010, 06:18 AM
  5. Replies: 1
    Last Post: April 5th 2010, 12:51 AM

Search Tags


/mathhelpforum @mathhelpforum