Consider taking a random sample from a population with p = 0.25.
a. What is the standard error of ˆ p for random samples of size 400?
b. Would the standard error of ˆ p be smaller for random samples of size 200 or samples of size 400?
c. Does cutting the sample size in half from 400 to 200 double the standard error of ˆ p ? |
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