Functional performance testing · Question 34 of 60
How many test cases are needed to confirm "98% accuracy with a ±4% margin of error at a 95% confidence level" under all conditions?
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Answer
- D 601
Explanation
"98% accuracy, ±4%, 95% confidence" leads to 601 test cases. The number is deliberately calculated cautiously: it assumes that nothing is known yet about the true accuracy, so it could lie anywhere between 0% and 100%. To reach the 98%, at least 589 of the 601 cases must pass.