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You may need to use the appropriateappendix tableortechnologyto answer this question. A researcher reports survey results by stating that the standard error of the mean

You may need to use the appropriateappendix tableortechnologyto answer this question.

A researcher reports survey results by stating that the standard error of the mean is20. The population standard deviation is520.

How large was the sample used in this survey?

What is the probability that the point estimate was within30of the population mean? (Round your answer to four decimal places.)

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