3.1 Below given the Turbidity values measured in regular five minutes intervals of 50 outlet water samples. Turbidity values were measured in units NTU.
3.50, 4.55, 3.60, 7.55, 7.15, 6.65, 8.65, 9.85, 7.85, 4.55
2.55, 3.45, 4.25, 2.65, 3.85, 4.85, 6.25, 7.75, 4.55, 4.35
3.45, 3.85, 5.65, 6.85, 7.65, 9.45, 8.15, 7.55, 4.55, 5.05
4.95, 4.25, 3.65, 3.25, 3.25, 3.15, 2.65, 3.05, 4.05, 4.35
4.55, 5.05, 5.15, 5.75, 6.05, 7.15, 7.85, 8.35, 8.05, 7.55
a) Present the data in a table, grouped into eight classes of same size starting from 2 NTU up to 10 NTU.