quiz factors that affect ci width

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Calculate the margin-of-error for a 2SD confidence interval. Round to two decimal places.

Calculate the lower bound of your 2SD confidence interval using the MOE from the previous question. Round to 2 decimal places.

Calculate the upper bound of a 2SD CI using the MOE from the first question. Round to 2 decimal places.


Could the theory based approach be used to calculate a CI for this data?

Without recalculating the CI, if the sample size were smaller than n = 286, would the width of the CI become wider, narrower, or remain the same?

Group of answer choices

Without recalculating and using the original sample size of n = 286, if the confidence level were increased from 95% to 99.9%, would the width of the interval become wider, narrower, or remain the same?

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Suppose Bobby Bashful conducts the same study but with a sample size of n=185. He calculates a 99.9% CI for the mean hours spent watching Netflix for Joliet, IL residents to be (4.38, 6.12). Is it possible that LaTeX: mu = 4


μ


=


4

?

Group of answer choices

Use the same CI as in the previous problem, a 99.9% CI for the mean hours spent watching Netflix for Joliet, IL residents is (4.38, 6.12). Does this interval contain LaTeX: mu


μ

?

Group of answer choices

Assume that a 99.9% CI for the mean hours spent watching Netflix for Joliet, IL residents is (4.38, 6.12). Which of the following are plausible values for LaTeX: mu


μ

? Mark all that apply.

Group of answer choices

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