Test the following hypotheses for a multinomial probability distribution by using the chi² goodness of fit test. H_0: p_A=0.40, p_B=0.20, p_C=0.40. What is the hypothesis being tested?
1) H_0: p_A=0.40, p_B=0.20, p_C=0.40
2) H_0: p_A=0.40, p_B=0.20
3) H_0: p_A=0.40, p_C=0.40
4) H_0: p_B=0.20, p_C=0.40