Lyme disease is caused by a bacteria called Borrelia burgdorferi and is spread through the bite of an infected black-legged tick, generally found in woods and grassy areas. There were 213,515 confirmed cases reported to the Centers for Disease Control (CDC) between 2001 and 2010, and these are broken down by age and sex in the figure. Confirmed Lyme disease cases in the United States, 2001-2010 Cases 25,000- 20,000- 15,000- 10,000- 5,000- 20 40 45 Age (years) Male Female 65 70 75 80 90 Reported cases of Lyme disease are most common among boys aged 5-9 The individuals are the 213.515 people with confirmed cases, and two of the variables measured on each individual are sex and age. Considering males and females separately, we could draw a histogram of the variable age using class intervals 0 to