Concept explainers
The correct statement for the margin of error when confidence interval decreases
from 95% to 80% (a) 3%, because the same sample is used, (b) less than 3%, because the require
less confidence, (c) less than 3%, because the
Answer to Problem 24E
The correct option is (b) less than 3%, because we required less confidence.
Explanation of Solution
Given information:
Margin of error = 3%
Confidence interval = 90% to 80%
The confidence level is decreased from 95% to 80%. Thus, the confidence interval becomes less accurate and less wide.
Since decrease in confidence interval will decrease in the margin of error thus the margin of error will be less than 3%.
Hence, the correct option is (b).
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