Mathematics, 15.04.2020 23:37 haileyrae187

A recent survey conducted by Wall Street Journal indicates that the average reading time of 100 its readers/participants was 45 minutes and the standard deviation was 20 minutes. The journal is now planning another survey study. If the acceptable error is 3 minutes and a confidence level of 99% is desired, what would be the minimum sample size needed for the upcoming survey?

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A recent survey conducted by Wall Street Journal indicates that the average reading time of 100 its...