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Math Help - two-sample test for equality of means assuming unequal variances

  1. #1
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    two-sample test for equality of means assuming unequal variances

    a.
    Comparison of GPA for randomly chosen college juniors and seniors:
    = 3.05, s1 = .20, n1 = 15, = 3.25, s2 = .30, n2 = 15, α = .025, left-tailed test.

    b.
    Comparison of average commute miles for randomly chosen students at two community colleges:
    = 15, s1 = 5, n1 = 22, = 18, s2 = 7, n2 = 19, α = .05, two-tailed test.

    c.
    Comparison of credits at time of graduation for randomly chosen accounting and economics students:
    = 139, s1 = 2.8, n1 = 12, = 137, s2 = 2.7, n2 = 17, α = .05, right-tailed test.

    Do a two-sample test for equality of means assuming unequal variances.

    For A,B, and C find:
    d.f.
    Standard Error
    t-calc
    p-value
    t-crit
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by psfrag26 View Post
    a.
    Comparison of GPA for randomly chosen college juniors and seniors:
    = 3.05, s1 = .20, n1 = 15, = 3.25, s2 = .30, n2 = 15, α = .025, left-tailed test.
    b.
    Comparison of average commute miles for randomly chosen students at two community colleges:
    = 15, s1 = 5, n1 = 22, = 18, s2 = 7, n2 = 19, α = .05, two-tailed test.
    c.
    Comparison of credits at time of graduation for randomly chosen accounting and economics students:
    = 139, s1 = 2.8, n1 = 12, = 137, s2 = 2.7, n2 = 17, α = .05, right-tailed test.
    Do a two-sample test for equality of means assuming unequal variances.

    For A,B, and C find:
    d.f.
    Standard Error
    t-calc
    p-value
    t-crit
    See the Wikipedia page for the t-test, what you want is about half way down (here)

    CB
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