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The unknown population mean number of advertising or solicitation emails a retail customer received per day...

The unknown population mean number of advertising or solicitation emails a retail customer received per day is 7.2. An advertising company wants to estimate the population number of solicitation e-mails a customer received per day. Which action should the company avoid taking according to the central limit theorem?

Perform many samples of customers

Include a maximum of ten customers in each sample

Calculate the mean of the sample averages

Use large sample sized

Math   Statistics-And-Probability   
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