Results 1 to 2 of 2

Math Help - Random Sample

  1. #1
    Newbie
    Joined
    Apr 2009
    Posts
    3

    Random Sample

    I have one more question I don't get from my Homework

    The life expectancy in the U.S is 75 with a standard deviation of 7 years. A random sample of 49 individuals is selected.

    a. What is the probability that the sample mean will be larger than 77 years?

    b. What is the probability that the sample mean will be between 73.5 and 76 years?

    Thank you
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member
    Joined
    Jan 2009
    Posts
    105
    Quote Originally Posted by Joseph Smith View Post
    I have one more question I don't get from my Homework

    The life expectancy in the U.S is 75 with a standard deviation of 7 years. A random sample of 49 individuals is selected.

    a. What is the probability that the sample mean will be larger than 77 years?

    b. What is the probability that the sample mean will be between 73.5 and 76 years?

    Thank you
    The required formulas are in Sample Means
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. A random sample X
    Posted in the Statistics Forum
    Replies: 4
    Last Post: January 1st 2010, 01:24 AM
  2. Random sample
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: January 10th 2009, 02:23 AM
  3. Random Sample
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: August 2nd 2008, 04:57 AM
  4. Random sample
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: May 8th 2008, 07:21 PM
  5. Sample Random Sample Question 2
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: January 7th 2008, 06:58 AM

Search Tags


/mathhelpforum @mathhelpforum