Statistics with Probability

You must be logged in to reply to this topic.

  • Author
    Posts
  • #12962

    Ezra Halleck
    Participant

    8. The FDA has decided to measure 8-ounce cans of Hershey Cocoa. The weights of 50 containers are found in the accompanying excel file. H0: μ≥8
    (a) Use a pvalue approach to the t-test at the α = 5% significance level.
    (b) Make a histogram to verify that the weights are approximately normally distributed.

    #16173

    Corey
    Member

    How would go about solving this problem?

    #16191

    Sunny3oy
    Member

    I think half of these problems can only be done on excel, which I think the professor forgot to attach the excel file onto each topics/questions.

    #16198

    Ezra Halleck
    Participant

    Excel file for problems 7,8, extra 1 and extra 2 are in the openlab “exam” page (where the final exam word file is).

    #16242

    hey prof need help with interpreting what is being ask and how to start the solutions.

    #16244

    igorekk132
    Participant

    Igor Myshcenko ok lets try it: #8 a)

    HNull > 8 1 tailed
    Sample SD = 0.04
    Average mean ( Xbar) = 7.99
    n=50
    Alpha = 5%
    procedure:
    SD(XBar)= 0.04/(sqrt(50)=0.00565
    TS=(7.99-8.0)/0.00565=-1.77 <- take absolute value
    =TDIST(1.77,(50-1),1) = 0.041
    finally find the critical region for 1 tailed =SD(Xbar)*TINV(2*p,dof)+Hnull)
    =0.00565*TINV(2*0.041,49)+8 equals to 8.01 WE should obtain the critical region for 1 tail. not really sure what to do next(

    #16245

    Afzal
    Participant

    i think you made a little mistake like i did in no-6 which is “HNull > 8 ” because i think we have to write like H1: μ > 8.

    #16246

    igorekk132
    Participant

    Could be, i got pretty confused while doing this prob. Left pretty confident in the beginning though lol o.O

    #16247

    igorekk132
    Participant

    Felt*

    #16252

    mmoej290
    Member

    hey, not to sound rude but ann someone rephrase what igorekk132 wrote as the answer, or even he can rephrase it. also it would be cool if u want to attach an exal or pdf file instead of using the post, what ever is easier.

Viewing 10 posts - 1 through 10 (of 10 total)

You must be logged in to reply to this topic.