Each of 16 students measured the circumference of a tennis ball by four different methods, which were: A: Estimate the circumference by eye
B: Measure the diameter with a ruler, then compute the circumference
C: Measure the circumference with ruler and string
D: Measure the circumference by rolling the ball along a ruler
The results (in cm) are given below, In Increasing order for each method:
A: 18.0 18.0 18.0 19.0.22.0, 22.0, 22.5, 22.8, 24.0, 24.0, 25.0, 25.0, 25.0, 25.0, 26.0, 26.4
B: 18.8. 18.9, 18.9. 19.8, 20.1. 20.4, 20.4, 20.4, 20.4, 20.5. 21.2. 21.5, 22.0. 22.0, 22.0, 23.6
C: 20.2, 20.5, 20.5. 20.6, 20.8, 20.9. 21.0, 21.0, 21.0, 21.0, 21.0, 21.3, 21.5, 21.5, 21.5, 21.6
D: 20.0 20.0 20.0 20.0 20.2, 20.5, 20.5. 20.5, 20.7, 20.7, 21.0, 21.2, 21.5, 21.6, 22.1, 22.3.
compute the first and third quartiles for each method round the answer to two decimal places