7 in a random sample of 50 full-time college students did not purchase any music in the past month. Obtain the 95% confidence interval for the proportion of full-time college students who did not purchase any music last month.
Question 2 options:
a) [0.004 , 0.136]
b) [0.014 , 0.266]
c) [0.044 , 0.236]
d) [0.020 , 0.120]