State whether each of the following research examples is best summarized as grouped or ungrouped data.
Explain your answer.
The time (in seconds) it takes 100 children to a cognitive skills game.
The number of single mothers with 1, 2, 3, or 4 children.
The number of teenagers who have experimented with smoking (yes, no).
The age (in years) of freshman students in a local college.
The handedness (right- or left-handed) of gifted children.