In a chi-square test of goodness of t based on a multinomial experiment involving k = 5 possible outcomes and n = 75 trials, the null hypothesis to be tested is H0 : p1 =0.1, p2 =0.2,p3 =0.3, p4=0.2, p5 =0.2 and the observed frequencies are 6,16,21,18 and 14. The observed test statistic value is about: 0 2.167. O 2.267. O 1.133. O 1.233