Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with a = 2.2%. A random sample of 12 Australian bank stocks has a mean x = 6.69%. Do these data indicate that the dividend yield of all Australian bank stocks is higher than 6.2%? What is the P value? a = 0.1. Yes, p-value = 0.11 O No, p-value = 0.11 Yes, p-value = 0.22 O No, p-value = 0.22 None of the above