APFIVE Confidence Level Interpretation
A statistics student claims: “If I construct a 99% confidence interval for a population mean, there is a 99% probability that the true mean falls within my specific interval.” What is wrong with this interpretation?
A
The confidence level should be stated as a decimal, not a percentage
B
The student should have used a z-interval instead of a t-interval
C
The confidence level refers to the method, not any single interval
D
Confidence intervals can only be constructed for proportions, not means
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