A random sample of n = 16 mid-sized cars tested for fuel consumption gave a mean of x̄ = 23.22 miles per gallon with a standard deviation of s = 2.57 miles per gallon. Assuming that the miles per gallon given by all mid-sized cars have a normal distribution, find a 99 % confidence interval for the population mean, μ.
Round your answers to two decimal places.
21.56 ≤ μ ≤ 24.88