Results 1 to 3 of 3

Math Help - Distribution for mean of a sample

  1. #1
    Member
    Joined
    Oct 2009
    Posts
    196
    Thanks
    1

    Distribution for mean of a sample

    Every year the pH-value is measured in several lakes in an area. The pH-value in the lakes is normal distributed with expected value = 6 and standard deviation 0,25. A scientist randomly selects 4 lakes and measures the pH in these. What is the distribution for the mean of the sample? (X with a _ on top)

    Thanks!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by gralla55 View Post
    Every year the pH-value is measured in several lakes in an area. The pH-value in the lakes is normal distributed with expected value = 6 and standard deviation 0,25. A scientist randomly selects 4 lakes and measures the pH in these. What is the distribution for the mean of the sample? (X with a _ on top)

    Thanks!
    The formula for the sampling distribution of the mean will be in your class notes, textbook and can also be easily found using Google. Where are you stuck?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Oct 2009
    Posts
    196
    Thanks
    1
    Haha, sorry for asking what is probably very easy questions. I was sick and home from school last week, and I just can't seem to find the information I need from my extremely bad textbook. But all right, I'll see if I can google it.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Sample mean distribution?
    Posted in the Statistics Forum
    Replies: 0
    Last Post: November 12th 2011, 04:37 PM
  2. Distribution of sample mean
    Posted in the Statistics Forum
    Replies: 0
    Last Post: February 1st 2010, 12:26 PM
  3. Sample distribution of sample variance
    Posted in the Statistics Forum
    Replies: 10
    Last Post: November 16th 2009, 01:12 PM
  4. distribution sample median
    Posted in the Statistics Forum
    Replies: 0
    Last Post: November 2nd 2009, 01:27 PM
  5. Replies: 3
    Last Post: February 6th 2009, 04:59 AM

Search Tags


/mathhelpforum @mathhelpforum