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Math Help - Stat Novice Needs Help With Probability Problem!

  1. #1
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    Stat Novice Needs Help With Probability Problem!

    Hi Everyone!

    I'm so happy to have found this forum. I am the absolute worst at math, and I'm almost positive I'm doing this problem wrong. I would be extremely helpful for any help!




    1. The following table shows the number of patients with different types of disorders / disease associated with patients at General Hospital within the last year. Assume each patient has only one disorder

    Types of Disorders / Disease Number of Patients with Disorder / Disease
    Liver Disease 346
    Lung Cancer 147
    Heart Disease 232
    Diabetes 187
    Alzheimer’s 93


    1. Find the probability that a random person selected has liver disease
    2. Find the probability that a random person selected has lung cancer or liver disease or heart disease
    3. Find the probability that a random person selected has liver disease and lung cancer

    d. What type of probability calculation approach is being exercised in this example (classical, relative frequency or subjective)?

    My answers:
    a. 346/1005 = .34
    b. (147+346+232)/1005 = .72
    c. Not really sure what my professor is asking here. The question says to assume each person has only one disorder.
    d. Classical

    Thanks again for your time everybody!
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  2. #2
    MHF Contributor
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    Re: Stat Novice Needs Help With Probability Problem!

    Hey NoviceStats.

    Hint: If one person can only have one disease then the probability of having two should be 0.
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  3. #3
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    Re: Stat Novice Needs Help With Probability Problem!

    @Chiro:

    Haha I assumed that, but I did not know if maybe it was a trick question or something. Thank you!
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