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How many consumers need to be? selected

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Reference no: EM132522373

An advertising executive wants to estimate the mean weekly amount of time consumers spend watching traditional television daily. Based on previous? studies, the standard deviation is assumed to be 17 minutes. The executive wants to? estimate, with? 99% confidence, the mean weekly amount of time to within ±3 minutes.

a. What sample size is? needed for 99% confidence?

b. If? 95% confidence is? desired, how many consumers need to be? selected?

Reference no: EM132522373

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