Question: The population standard deviation is known to be $650. A researcher wishes to estimate within $160 the average amount of money a county spends on

The population standard deviation is known to be $650. A researcher wishes to estimate within $160 the average amount of money a county spends on road repairs each year. If she wants to be 97% confident, how large a sample is necessary? Step 1: Which formula will you use for this problem? @ _ a J IEa,ra-()

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