The number of individuals in the sample, n = 31
A one-sample (or one mean) t-test is applied to test whether the population-parameter is significantly different from some hypothetical value.
The degrees of freedom of the t-test, df = n – 1
Given,
The degrees of freedom of the t-test, df = 30
We have to find the sample size, n = df + 1
Therefore, the number of individuals in the sample:
n = df + 1
= 30 + 1
= 31
That is, the number of individuals in the sample, n = 31.
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