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Which of the following case would NOT change confidence interval? (a) Standard deviation is increased from 13 to 25. (b) Sample size is decreased

Which of the following case would NOT change confidence interval? (a) Standard deviation is increased from 13 to 25. (b) Sample size is decreased from 100 to 50. (c) Confidence level is increased from 90% to 95% . (d) Sample mean is increased from 25 to 30.

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ANSWER D Sample mean is increased from 25 to 30 A confidence interval displays the probability that a parameter will fall between a pair of values aro... blur-text-image

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