Student's t is used when
A) the sample is more than 30 observations.
B) the sample size is $\le$ 5% of the population.
C) the population standard deviation is unknown.
D) any time.

Question

Quizplus · Accepted Answer

Student's t-test is used when the population standard deviation is unknown. When the sample size is more than 30, a normal distribution can be assumed, and thus a z-test can be used. Option B is incorrect as the sample size being less than 5% of the population does not determine when to use Student's t-test. Option D is also incorrect as there are certain conditions and assumptions that need to be met before using Student's t-test.

Student's T Is Used When A) the Sample Is More ≤\le≤

Student's T Is Used When
A) the Sample Is More $\le$