REQUESTED ASSISTANCE - Would you please review the provided answer as well as the provided detailed explanation / analysis for the answer to the below range question. Is the provided answer correct, and what improvements can be made to expand upon the provided detailed explanation / analysis for the answer (please provide substantive responses)?

What is the range for a sample of July electric bills for all electric homes of similar size: $200, $190, $175, $120, $190, $100, $110, $100, $120, $180, and $220?

ANSWER: Range is a simplest measure of dispersion used in statistics. It gives idea of overall dispersion of the data. The formula for Range is Maximum observation - minimum observation = 220-100=$120