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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: 18,479, Reputation: 1857
    Admin & Wine Expert
     
    #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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