If n = 160 and ˆ p (p-hat) = 0.55, construct a 90% confidence interval.
Added by Kenia R.
Step 1
The formula for the standard error of a proportion is sqrt[(p-hat * (1 - p-hat)) / n]. Plugging in the given values, we get sqrt[(0.55 * (1 - 0.55)) / 160] = 0.039. Show more…
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