Results 1 to 4 of 4

Math Help - Frequency Distribution?

  1. #1
    Junior Member
    Joined
    Oct 2007
    Posts
    48

    Question Frequency Distribution?

    Hi all, plz help me on this..

    The output in units of 20 employees during one week was as follows:
    65, 69, 70, 71, 70, 68, 69, 67, 70, 68
    72, 71, 69, 74, 70, 73, 71, 67, 69, 70

    a) Start doing tabulation of given data. Make 5 classes by using suitable class interval.
    b) Make the frequency distribution.
    c) Also make the column of class mark.
    d) Also find out the mean by constructing relevant column f X
    e) Also compute relative frequency distribution and cumulative frequency distribution.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    GAMMA Mathematics
    colby2152's Avatar
    Joined
    Nov 2007
    From
    Alexandria, VA
    Posts
    1,172
    Awards
    1
    Quote Originally Posted by cu4mail View Post
    Hi all, plz help me on this..

    The output in units of 20 employees during one week was as follows:
    65, 69, 70, 71, 70, 68, 69, 67, 70, 68
    72, 71, 69, 74, 70, 73, 71, 67, 69, 70

    a) Start doing tabulation of given data. Make 5 classes by using suitable class interval.
    b) Make the frequency distribution.
    c) Also make the column of class mark.
    d) Also find out the mean by constructing relevant column f X
    e) Also compute relative frequency distribution and cumulative frequency distribution.
    Sort the date in ascending or descending order. You have 20 employees, but you would like 5 classes. These classes do not have to be the same sample size, so make their intervals equal the length of: \frac{MAX-MIN}{5}.

    Your frequency distributions depend on your classes.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by cu4mail View Post
    Hi all, plz help me on this..

    The output in units of 20 employees during one week was as follows:
    65, 69, 70, 71, 70, 68, 69, 67, 70, 68
    72, 71, 69, 74, 70, 73, 71, 67, 69, 70

    a) Start doing tabulation of given data. Make 5 classes by using suitable class interval.
    b) Make the frequency distribution.
    c) Also make the column of class mark.
    d) Also find out the mean by constructing relevant column “f X”
    e) Also compute relative frequency distribution and cumulative frequency distribution.
    The largest is 74 and the smallest 65 and you want 5 classes that and that the data are all integers suggests that we use 63-65, 66-68, 69-70, 71-73, 74-77 as our classes.

    RonL
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Apr 2009
    Posts
    1
    Hello,
    Why does it not matter that the lower class limits and upper class limits can sometimes arbitrarily fall below and above the actual data?

    Just looking at this from a new perspective, it seems like it should matter.

    Thanks,
    Jason
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Help with Frequency Distribution?
    Posted in the Statistics Forum
    Replies: 1
    Last Post: March 24th 2011, 03:12 PM
  2. frequency distribution
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: May 19th 2010, 08:03 AM
  3. Frequency Distribution (Classes)
    Posted in the Statistics Forum
    Replies: 5
    Last Post: December 13th 2009, 05:38 AM
  4. Replies: 3
    Last Post: January 22nd 2009, 06:55 PM
  5. frequency distribution .........
    Posted in the Statistics Forum
    Replies: 2
    Last Post: March 23rd 2007, 04:16 AM

Search Tags


/mathhelpforum @mathhelpforum