Results 1 to 2 of 2

Math Help - I need some help with a statistics problem please?

  1. #1
    Newbie
    Joined
    Dec 2012
    From
    kent
    Posts
    1

    I need some help with a statistics problem please?

    Hi

    I am new to this site and have joined hoping somebody could help me with some statistics problems I am having.
    Basically, the question is:
    Packets of crisps from a production line have a weight distribution that is normal with a mean of 50.0 grams and a standard deviation of 2.0 grams. Samples are taken of size 36.

    What is the probability that a sample mean is less than 49.0 grams? (Give answer to four decimal places.)

    What would be the control limits for a three standard error control chart in these circumstances? Give your answer in the format (to the nearest gram):
    (25,72) grams
    if you think these are the lower and upper limits

    What proportion of sample means would be outside the these control limits? (Give your answer as a percentage, accurate to 0.1%

    Thank you very much to anybody who answers - you have no idea how much you will be helping me!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    12,108
    Thanks
    970

    Re: I need some help with a statistics problem please?

    post statistics problems in the statistics forum
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. statistics problem
    Posted in the Statistics Forum
    Replies: 2
    Last Post: October 23rd 2009, 01:15 PM
  2. statistics problem help
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: May 1st 2009, 02:01 AM
  3. 10.32: Help with statistics problem:
    Posted in the Statistics Forum
    Replies: 0
    Last Post: February 27th 2009, 03:32 PM
  4. 15.10: Help with statistics problem
    Posted in the Statistics Forum
    Replies: 0
    Last Post: February 27th 2009, 03:22 PM
  5. Statistics Problem Please Help!
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: November 26th 2007, 05:32 AM

Search Tags


/mathhelpforum @mathhelpforum