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: p120.1,19220.2,p3=O.3,p4=O.2,p5=0.2 and the observed frequencies are 12, 32, 42, 36 and 28. Using a = 0.05, the critical value is: O 11.1. o 0.711. 0 9.49. o 1.15