PRC-2 · Chapter 12 · Question 39 of 55
When conducting a standard hypothesis test, if the sample size is small (n < 30) and the true population standard deviation is strictly unknown, which distribution must be applied?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: C) The Student's T-distribution
Explanation
When dealing with small samples (n < 30) where the population standard deviation is unknown, the T-distribution is mathematically required because its thicker tails account for the increased uncertainty in the estimate.
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