Summarize Data (Expressions & Variables)

Using the nlsw88 data,

1. Use sum to summarize the variable wage.
   1. What is the mean wage?
   2. What is the standard deviation?
   3. What are the minimum and maximum values?
2. Use the detail option with sum.
   1. What is the median (50th percentile) wage?
   2. What are wages at the 25th and 75th percentile?
3. Restrict the summary to women who are college graduates using if.
   1. Is the mean wage for college graduates higher or lower than the overall mean?
   2. Is the standard deviation for college graduates larger or smaller than in the full sample?

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