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3 August, 04:34

A golfer would like to test the hypothesis that the variance of his golf score equals 10.0. a random sample of 28 rounds of golf had a sample standard deviation of 3.5. what is the number of degrees of freedom for this hypothesisâ test?

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  1. 3 August, 07:45
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    It depends on which statistic test we wish to perform, the formula to find a degree of freedom could be different.

    for Normal Distribution test, we do not need to find a degree of freedom

    for T-test and Chi-Square test, we do n - 1 to find the degree of freedom, where 'n' is the sample size.

    if we have two different sample size, then the degree of freedom is given by (n₁ + n₂) - 2

    We are given only one sample size, n = 28, hence the degree of freedom is 28 - 1 = 27
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