APFIVE Meaning of a Confidence Level
Which of the following best explains why only approximately C% of confidence intervals for the difference in two proportions will capture the true difference in population proportions?
A
The normal approximation is only valid C% of the time
B
Random sampling variability causes some intervals to miss the parameter
C
The true difference changes for each sample
D
Calculation errors occur in approximately (100-C)% of intervals
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