Where are the old folks? Based on data from the 2010 U. S. Census, the percent of residents aged 65 or older in the 50 states and the District of Columbia has mean 13.26% and standard deviation 1.67%
SHOW YOUR WORK!
a. Find and interpret the standardized score (z-score) for the state of Colorado, which had 9.7% of its residents age 65 or
older.
b. The standardized score for Florida is 2.60. Find the percent of the state's residents that were 65 or older.