Considering the following scenario, which method would be most appropriate when calculating the margin of error for the population mean? An economist wants to estimate the mean number of school children (in thousands) who read above their grade level in a major city in Ohio. He obtains information from 15 school children in the city and finds the mean to be 10.3. The population is assumed to be normally distributed. Answer Tables Keypa Keyboard Shortcu O Normal z-distribution O Student's t-distribution More advanced statistical techniques