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    Dougkim1's Avatar
    Dougkim1 Posts: 2, Reputation: 1
    New Member
     
    #1

    Apr 16, 2010, 11:17 PM
    Twenty-five blood samples were selected by taking every seventh blood sample from rac
    Twenty-five blood samples were selected by taking every seventh blood sample from racks holding
    187 blood samples from the morning draw at a medical center. The white blood count (WBC)
    Was measured using a Coulter Counter Model S. The mean WBC was 8.636 with a standard deviation
    Of 3.9265. (a) Construct a 90 percent confidence interval for the true mean. (b) Why might
    Normality be an issue here? (c) What sample size would be needed for an error of ± 1.5 with
    98 percent confidence?
    Dougkim1's Avatar
    Dougkim1 Posts: 2, Reputation: 1
    New Member
     
    #2

    Apr 16, 2010, 11:20 PM

    Twenty-five blood samples were selected by taking every seventh blood sample from racks holding
    187 blood samples from the morning draw at a medical center. The white blood count (WBC)
    Was measured using a Coulter Counter Model S. The mean WBC was 8.636 with a standard deviation
    Of 3.9265. (a) Construct a 90 percent confidence interval for the true mean. (b) Why might
    Normality be an issue here? (c) What sample size would be needed for an error of ± 1.5 with
    98 percent confidence?
    Curlyben's Avatar
    Curlyben Posts: 18,514, Reputation: 1860
    BossMan
     
    #3

    Apr 16, 2010, 11:22 PM
    Thank you for taking the time to copy your homework to AMHD.
    Please refer to this announcement: https://www.askmehelpdesk.com/financ...-b-u-font.html

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