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Online ProgramA restaurant claims people can eat at their establishment for $20 or less per person. A survey company asked 80 random people exiting the restaurant what they paid for their meal. The mean response was $21.98 per person with a standard deviation of $1.83. Given the table below that shows the common z-scores. Based on the analysis of these responses, what is the 95% confidence interval of the mean cost of a meal at the restaurant?