Textbook ExpertVerified Tutor
10 Nov 2021
Given information
The sample size is n=1200 and the sample proportion is p'=65%. From the previous task, the 90% confidence interval for the population proportion is found to be:
and the error bound is .
Step-by-step explanation
Step 1.
The formula for the error bound is:
Notice that the margin of error is directly proportional to the critical z value .
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