two-sample t-test (Welch df = 59.91)

t = 2.1576, p = 0.035

At alpha = 0.05: reject the null hypothesis. Assumes two independent samples (for paired data, use the one-sample test on differences).

Steps

  1. 1.difference = 78.2 - 74.5 = 3.7
  2. 2.SE = sqrt(s1²/n1 + s2²/n2) = sqrt(1.3653 + 1.5753) = 1.71483
  3. 3.t = 3.7 / 1.71483 = 2.1576
  4. 4.df (Welch-Satterthwaite, the software formula) = 59.91
  5. 5.p-value = 0.035

Two-sample t-test calculator (Welch) · free from StatsLearn