You run an advertising company and need to know how much

Reference no: EM13603181

You run an advertising company and need to know how much time per day an average person spends listening to the radio. You want to be within 4 minutes of the population mean listening time with 95% confidence. The population standard deviation is known to be 25 minutes. How large a sample do you need to collect?

Reference no: EM13603181

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