Mathematics, 19.03.2020 07:00 BardiFan

A recent Gallup poll showed the president’s approval rating at 60%. Some friends use this information (along with the sample size from the poll) and find theory-based confidence intervals for the proportion of all adult Americans that approve of the president's performance.
Of the following four confidence intervals, identify the ones that were definitely done incorrectly. (There may be more than one interval that is incorrect.)

a. (0.58, 0.62)
b. (0.47, 0.53)
c. (0.60, 0.66)
d. (0.57, 0.63)

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A recent Gallup poll showed the president’s approval rating at 60%. Some friends use this informatio...