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To study the image of the different politicians, respondents are asked to rate them on a (continuous) scale from 0 to 10 points. It is

To study the image of the different politicians, respondents are asked to rate them on a (continuous) scale from 0 to 10 points. It is known that the standard deviation of this variable is 1.5 points, how many cases are needed if e=0.05? Use a confidence of 95%.

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