Quantitative Methods 2017

Example: Contingency tables

Observed

Toxicity

No Toxicity Total

Treatment A 30

70

100

Treatment B 40

60

100

Total

70

130

-

Expected

Toxicity

No Toxicity Total

Treatment A 35

65

100

Treatment B 35

65

100

Total

70

130

-

P=0.14

=2.2

http://www.medcalc.org/manual/chi-square-table.php

http://statpages.org/ctab2x2.html