Question

In: Statistics and Probability

People who develop a deep vein thrombosis (DVT) in a leg are treated with anti-coagulants. However,...

  1. People who develop a deep vein thrombosis (DVT) in a leg are treated with anti-coagulants. However, many of them later suffer “post-thrombotic syndrome” (PTS) (swelling, skin ulcers, etc.).

    One way to help prevent this syndrome is the use of elastic compression stockings. Should the stockings be worn for two years after DVT, or is one year good enough? 518 patients were randomly assigned to wear elastic compression stockings at least 6 days a week for either one or two years.

    Here are the results:

    Elastic Compression Stockings

    one year

    two years

    TOTAL

    PTS occurred

    51

    34

    85

    No PTS

    205

    228

    433

    TOTAL

    256

    262

    518

    Fill in the blanks below to use a Chi-Square test to determine if the length of time makes a difference in the risk of DVT.

    The Chi-Square statistic,rounded to three decimal places, is X2 = .

    The degrees of freedom are df = .

    The P-value, rounded to three decimal places, is .

  1. Complete your Chi-Square test for Question Number 3 by giving your conclusion in the space below.

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Expert Solution

orchestra answered 2 years ago
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