In problem solving, the initial state and goal state make up the problem space

The largest projected increases of Americans age 65 years and older that jumps from 54.6 million to 71.5 million, come in the years

a) 2010-2020 b) 2030-2040 c) 2040-2050 d) 2050-2060

Which of the following is NOT a measure of spread?

a. crude range b. standard deviation c. standardized range d. interquartile range