(Solved): Required information Each of 16 students measured the circumference of a tennis ball by four diffe ...

Required information 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 $$\mathrm{cm}$$ ) are given below, in increasing order for each method: A: $$18.0,18.0,18.0,19.0,22.0,22.0,22.5,23.0,24.0,24.0,25.0,25.0,25.0,25.0,26.0,26.4$$ B: $$18.8,18.9,18.9,19.7,20.1,20.4,20.4,20.4,20.5,20.5,21.2,21.4,22.0,22.0,22.0,23.6$$ C: $$20.2,20.5,20.5,20.6,20.8,20.9,21.0,21.0,21.0,21.0,21.0,21.5,21.5,21.5,21.5,21.6$$ D: $$20.0,20.0,20.0,20.0,20.2,20.5,20.5,20.6,20.7,20.7,21.0,21.2,21.5,21.6,22.1,22.3$$ Compute the $$20\%$$ trimmed mean measurement for each method. Round the answers to two decimal places. Method A: $$\mathrm{cm}$$ Method B: $$\mathrm{cm}$$ Method C: $$\mathrm{cm}$$ Method D: $$\mathrm{cm}$$