A researcher wants to estimate the mean age of US Post Office employees. She therefore randomly samples 48 such employees which results in a sample mean age of 47.83 years with a sample standard deviation of 5.85 years. Use this information to construct a 98% confidence interval to estimate the mean age of Post Office employees. Assume employee age is normally distributed. Interpret your interval (i.e. what, exactly, does it mean in this case). Round to 4 (four) quality decimal places