Q365
A machine produced 20 defective articles in a batch of 400. After overhauling, it produced 10% defectives in a batch of 300. Which test of hypothesis can be applied to the above situation to examine whether the machine has improved?
A.
Test of significance of a sample proportion (two tail test)
B.
Test of significance of a sample proportion (one tail test)
C.
Test of significance of difference between two sample proportion (two tail test)
D.
Test of significance of difference between two sample proportion (one tail test)
AnswerAnswer: Option D
Solution
Answer: Option D
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