multi choice

In a chi-square test of goodness of t based on a multinomial experiment involving k = 5 possible outcomes and n = 150 trials, the null hypothesis to be tested is H0 : p120.1,p220.2,p320.3,p4:0.2,p5:0.2 and the observed frequencies are 12, 32, 42, 36 and 28. The observed test statistic value is about: 0 1.233. O 2.367. O 1.133 O 2.267