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Author Question: Name one possible problem that could occur in a survey to make what is reported to be a narrow 95 ... (Read 78 times)

bclement10

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on: Jul 24, 2018
Name one possible problem that could occur in a survey to make what is reported to be a narrow 95 confidence interval a meaningless result.

Question 2

Which would be wider, a 90 confidence interval or a 95 confidence interval? (Assume both of them were calculated using the same sample data.) Explain your answer.


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pallen55

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Reply #1 on: Jul 24, 2018
Answer to Question 1

ANY REASONABLE ANSWER OK. EXAMPLES: BIAS OF ANY KIND; A NON-RANDOM SAMPLE; MISLEADING WORDING OF QUESTIONS; ETC.

Answer to Question 2

THE 95 CONFIDENCE INTERVAL IS WIDER. SINCE THE DATA SAMPLE SIZE IS THE SAME AND YOU WANT MORE CONFIDENCE OF COVERING THE TRUE POPULATION VALUE, YOU NEED A LARGER MARGIN OF ERROR, WHICH RESULTS IN A WIDER CONFIDENCE INTERVAL.


bclement10

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Reply #2 on: Jul 24, 2018
TY


pallen55

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Reply #3 on: Jul 24, 2018
You're welcome


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