95% confidence limits u are ________________?
Correct answer: C. x±1.96 6/√n
- A. x±1.65 6/√n
- B. u±1.95 S/√n
- C. x±1.96 6/√n
- D. ±1.96 6/√n
Explanation
For a 95% large-sample confidence interval for μ, use x̄ ± 1.96σ/√n. The value 1.65 corresponds approximately to a 90% two-sided interval, while 1.95 is not the standard critical value.
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