A scientist was interested in studying if students religious beliefs change as they go through college. One hundred randomly selected students were asked before they entered college if they would consider themselves religious, yes or no. Four years later, the same 100 students were asked if they would consider themselves religious, yes or no. The scientist decided to perform McNemar's test. The data is below. What is the null hypothesis? After College(four years later) Before College Yes No Yes 55 23 No 11 11

a. H0: p1-p2=0
b. H0:mu1-mu2=0
c. H0: mu = 0
d. H0: p = 0
e. H0:mud=0