STATISTICAL TECHNIQUES AND TOOLS
SAMPLING DISTRIBUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following does NOT have an affect on the width of a confidence interval?
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Sample mean
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z*
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Sample standard deviation
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Sample size
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Explanation:
Detailed explanation-1: -The population size does not alter the ‘width of a ‘confidence interval’ for a ‘population proportion.
Detailed explanation-2: -An increase in sample size will decrease the standard error, which will decrease the margin of error, which will decrease the width of the interval. Options A and C will have no bearing on the width of the interval.
Detailed explanation-3: -Increasing the sample size decreases the width of confidence intervals, because it decreases the standard error.
There is 1 question to complete.