Tia, Bill, Kay, and Marco counted the number of fireflies they saw each day for a week in the summer. They each put their numbers in order from least to greatest.

Tia: 9, 12, 15, 18, 21, 24, 27

Bill: 3, 6, 8, 18, 20, 21, 22

Kay: 14, 15, 16, 18, 24, 27, 32

Marco: 2, 6, 10, 14, 18, 22, 26

Whose data is skewed left?

To determine whose data is skewed left, we need to look for the data that has a tail on the left side of the distribution. This means that the data is concentrated on the right side and there are some outliers on the left side.

Looking at the data, we can see that Tia's data is the only one that is increasing consistently from left to right, without any outliers or a concentration on the right side. Therefore, Tia's data is not skewed left.

Similarly, Kay's data is also increasing consistently from left to right, without any outliers or a concentration on the right side. Thus, Kay's data is not skewed left either.

Bill's data is also increasing consistently from left to right, but it has an outlier on the left side (3). This indicates a slight skewness to the left.

Finally, Marco's data is not increasing consistently from left to right and has a concentration on the left side. This means that Marco's data is skewed left.

Therefore, Marco's data is skewed left.