Student's t-test is applicable only when:

1.	Student's t-test is applicable only when:
A.	n ≤ 30 and σ is known
B.	n > 30 and σ is unknown
C.	n = 30 and σ is known
D.	All of these
Answer» B. n > 30 and σ is unknown

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Student's t-test is applicable only when:

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