Results 1 to 5 of 5

Math Help - Statistics

  1. #1
    Newbie
    Joined
    Sep 2007
    Posts
    10

    Statistics

    I have a question in my Home work that says this.


    What are the value of the mean, standard deviation and variance if you remove the unusual value?

    My question is What is meant by the term "Unusual Value"

    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by Braindead View Post
    I have a question in my Home work that says this.


    What are the value of the mean, standard deviation and variance if you remove the unusual value?

    My question is What is meant by the term "Unusual Value"

    Thanks
    And do you have some data to go with this?

    RonL
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Sep 2007
    Posts
    10
    A sample survey of 10 students was asked how far they travelled to university each day. The Distances were (in KM's)

    2,8,4,13,3,11,2,31,2,9

    Thanks
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by Braindead View Post
    A sample survey of 10 students was asked how far they travelled to university each day. The Distances were (in KM's)

    2,8,4,13,3,11,2,31,2,9

    Thanks
    The unusual value is 31km, as it is so much larger than the others. In fact
    if you ompute the mean and SD including it is is more than 2.5 SD from the
    mean.

    Also if you exclude the exceptional value from the sample you will find
    that it is more than 5 SD's from the mean of the remaining sample.

    RonL
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Sep 2007
    Posts
    10
    Thanks Captain your a gem
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. pet statistics
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: April 11th 2009, 12:07 PM
  2. Statistics
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: April 1st 2009, 11:48 PM
  3. Statistics
    Posted in the Statistics Forum
    Replies: 1
    Last Post: April 1st 2009, 12:08 PM
  4. Statistics
    Posted in the Statistics Forum
    Replies: 5
    Last Post: February 3rd 2008, 07:55 AM
  5. statistics
    Posted in the Statistics Forum
    Replies: 1
    Last Post: September 21st 2007, 09:02 AM

Search Tags


/mathhelpforum @mathhelpforum