2 Applying the 68-95-99.7 rule The average amount you spend on a lunch during the week is not known. Based on past experience, you are willing to...

6.2 Applying the 68–95–99.7 ruleThe average amount you spend on a lunch during the week is not known. Based on past experience, you are willing to assume that the standard deviation is about $2. You take a random sample of 36 lunches, and apply the central limit theorem.Round your answer to 2 decimal places.Fill in the blank: The 68–95–99.7 rule says that the probability is about 0.95 that is within $ _______ of the population mean .