QCEVault

Sampling and proportions — Question 44

Original QCE Vault practice · 5 marks

Q44 · Practice questionTechnology-activeComplex unfamiliar5 marks

QUESTION 44 (5 marks)

A manufacturer claims that the proportion of defective components is p=0.08p=0.08. In a random sample of 300 components, 34 are defective. Assuming the claim is correct, use a normal approximation to determine the probability of obtaining a sample proportion at least as large as the observed value. Comment on whether the result would be unusual at the 5% level.
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