Which of the following is one of the assumptions of a one-sample t-test?
A)The obtained scores are on an ordinal or interval scale.
B)The population standard deviation is estimated by computing .
C)The population standard deviation is known.
D)The population distribution is skewed.

Question

Which of the following is one of the assumptions of a one-sample t-test?
A)The obtained scores are on an ordinal or interval scale. 
B)The population standard deviation is estimated by computing . 
C)The population standard deviation is known. 
D)The population distribution is skewed.

Quizplus · Accepted Answer

A one-sample t-test assumes that the population standard deviation is unknown and must be estimated from the sample data by computing the sample standard deviation. Option A is incorrect because the type of scale of the obtained scores is not an assumption of a one-sample t-test. Option C is incorrect because the assumption is that the population standard deviation is unknown. Option D is incorrect because the assumption is that the population distribution is approximately normal or the sample size is large enough for the central limit theorem to apply.

Which of the Following Is One of the Assumptions of a One-Sample