According to the journal Chemical Engineering, an important property of a fiber is its
water absorbency. A random sample of 30 pieces of cotton fiber was taken and the absorbency on
each piece was measured. The following are the absorbency values:
18.71, 21.41, 20.72, 21.81, 19.29, 22.43, 20.17,23.71, 19.44, 20.50, 18.92, 20.33, 23.00, 22.85
,19.25, 21.77, 22.11, 19.77, 18.04, 21.12, 17.9, 17.9,19.44,19.44, 17.9, 20.33, 28.23, 15.20, 30.00,
29.4.
(i) Make a Histogram.
(ii) Make a Frequency polygon.
