The given dot plot shows the number of vacations taken by the sixth-grade students at Walker Junior High.
What is the interquartile range of the data set shown?
A.
3
B.
1
C.
2
D.
4
C. 2
To find the interquartile range, we first need to find the first and third quartiles.
- Q1 (lower quartile) is the median of the lower half of the data, which is 2 vacations.
- Q3 (upper quartile) is the median of the upper half of the data, which is 4 vacations.
To calculate the interquartile range, we subtract Q1 from Q3: 4 - 2 = 2.
Therefore, the interquartile range of the data set shown is 2.