Example 2: Degrees of Freedom for Two Sample t-test We have sufficient evidence to say that the mean weight of this species of turtle is not equal to 310 pounds. Since this p-value is less than our significance level α = 0.05, we reject the null hypothesis. Lastly, we’ll plug in the test statistic and degrees of freedom into the T Score to P Value Calculator to find that the p-value is 0.00149. Next, we’ll calculate the degrees of freedom:
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