Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Mathematics (https://www.askmehelpdesk.com/forumdisplay.php?f=199)
-   -   Normal distribution (https://www.askmehelpdesk.com/showthread.php?t=468380)

  • May 2, 2010, 02:41 AM
    jbk2000
    Normal distribution
    On the same diagram sketch three normal distributions, one with mean 0 and standard deviation 2, one with mean 0 and standard deviation 4, and one with mean 3 and standard deviation 2. Make sure that you label each of the three graphs.

    I do not understand how I am supposed to do this, can someone please help me.
  • May 2, 2010, 03:08 AM
    Unknown008

    Have you ever seen a normal distribution curve?

    This one is a good one:
    http://www.comfsm.fm/~dleeling/stati...rmal_curve.gif

    The line at the bottom gives the values where is the symbol for the mean.

    The blue areas denote the first standard deviations (denoted by , both positive (the right one, ) and negative (the left one ).
    The red areas denoted the second standard deviations and the orange the third standard deviations, where the curve is very close to the horizontal line.

    a) If the mean is 0, then replace by 0.
    From the mean towards the right, will be 0 + 2 = 2, will be 0 + 4 = 4 and will be 0 + 6 = 6.

    From the mean towards the left, will be 0 - 2 = -2 and so on.

    Is that clear enough?

    Remember that the curve should be symmetric about the mean, the curve is very near to the horizontal line at 3 standard deviations.
  • May 2, 2010, 03:33 AM
    Lochinvar West

    This site may help:

    An Introduction to Excel's Normal Distribution Functions
  • May 2, 2010, 04:53 AM
    singh2010
    Seems easy enough to do. Thanks for the help once again!

  • All times are GMT -7. The time now is 05:33 AM.