Large Counts Condition For Proportions
A researcher collects a sample of subjects and expects a proportion of success to be approximately . A confidence interval is then constructed using the normal approximation. Which of the following describes a potential error in this methodology?
A
He should have used the -distribution instead of the normal approximation.
B
He ignored that is less than 10, making the normal approximation invalid.
C
He incorrectly assumed the sample was collected using stratified sampling.
D
He miscomputed the sample proportion by using a weighted average.
E
He misinterpreted the significance level as the margin of error.
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