After once again losing a football game to the college's arch rival, the alumni association conducted a survey to see if alumni were in favor of firing the coach. An SRS of 100 alumni from the population of all living alumni was taken. Sixty-four of the alumni in the sample were in favor of firing the coach. Let p represent the proportion of all living alumni who favor firing the coach.
Referring to the information above, a 95% confidence interval for p is _____.
a. 0.64+/-0.360
b. 0.64+/-0.094
c. 0.64+/-0.079
d. 0.64+/-0.124