If we have a normal distribution, according to the Empirical Rule, what percent of data falls within 1 standard deviation of the mean? It's not 95%...

We use mean, median, and mode differently. For example, "average" housing prices are really medians. Grades are often calculated with a mean or weighted mean. If we compared our mean to the median and mode, they are not all the same number. Which one would you say better represents our group of numbers, and why?