A null hypothesis states that the population proportion p of headache sufferers who have better pain relief with drug A than with another pain reliever equals 0.50. For a crossover study with 13 subjects, all 13 have better relief with drug A. If the null hypothesis weretrue, by the binomial distribution the probability of this sample result(which is the mostextreme) equals (0.50)¹³ equals left parenthesis 0.50 right parenthesis Superscript 13

(0.50)13 <0.001. Infact, this is thesmall-sample P-value for testing H₀=0.50 against H_a>0.50. Does thisP-value give(a) strong evidence in favor of H₀ or(b) strong evidence against H₀? Explain why.