Asurvey was taken of children between the ages of 7 and 12. let a be the event that the person rides the bus to school, and let b be the event that the person has 3 or more siblings.

a 6-column table has 5 rows. the first column has entries walks to school, bikes to school, rides bus to school, driven to school, total. the second column is labeled 0 siblings with entries 24, 8, 18, 32, 82. the third column is labeled 1 sibling with entries 37, 9, 36, 58, 140. the fourth column is labeled 2 siblings with entries 12, 8, 12, 22, 54. the fifth column is labeled 3 or more siblings with entries 3, 2, 9, 10, 24. the sixth column is labeled total with entries 76, 27, 75, 122, 300.

which statement is true about whether a and b are independent events?