The document summarizes data collected on the number of SMS messages sent monthly by 72 people. It provides the following information: - 23 people sent 0-500 messages, 12 sent 501-1000, 9 sent 1001-1500, and so on, with 1 person sending 4501-5000. - The total number of messages sent was 103,475. - The median number of messages sent was 1200. - The most frequent amount of messages was 500, with 6 people sending that amount. - The standard deviation of the amounts sent was calculated to be 1,061.756, providing a measure of how spread out the data was from the average of 2250 messages.