A survey of 50 young professionals found that they spent an average of $24.87 when dining out, with a standard deviation of $12.83. Can you conclude statistically that the population mean is greater than $31? Use a 95% confidence interval The 95% confidence interval is. As $31 is $31. (Use ascending order. Round to four decimal places as needed.) OLDER of the confidence interval, we conclude that the population mean is greater than