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    Complexity07's Avatar
    Complexity07 Posts: 15, Reputation: 2
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    #1

    Mar 3, 2008, 10:29 PM
    Statistics
    Owens Orchards sells apples in a large bag by weight. A sample of seven bags contained the following number of apples: 23,19,26,17,21,24,22.

    a)verify that s (x-sample mean)=0


    This is what I'm coming up with, I'm not sure what I'm doing wrong. Help please

    (23-21.7)+(19-21.7)+(26-21.7)+(17-21.7)+(21-21.7)+(24-21.7)+(22-21.7)= -1.2

    I've tried rounding the 21.7 to 22, but I'm still not coming up with 0 :confused:
    ISneezeFunny's Avatar
    ISneezeFunny Posts: 4,175, Reputation: 821
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    #2

    Mar 3, 2008, 11:09 PM
    ... might be because the mean is 21.7143
    iamthetman's Avatar
    iamthetman Posts: 105, Reputation: 8
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    #3

    Mar 4, 2008, 08:33 AM
    Yes, you should be using the complete mean value of 21.71428571 and you also added and subtracted wrong in your statement above. The answer to your statement is actually 0.1
    Complexity07's Avatar
    Complexity07 Posts: 15, Reputation: 2
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    #4

    Mar 5, 2008, 12:37 PM
    I believe I see my mistake now, is this correct?

    ( 23-21.714285) + (19 - 21.714285) + ( 26 -21.714285) + ( 17 - 21.714285) + ( 21 - 21.714285) + (24- 21.714285) + ( 22-21.714285)=0.000005=0
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