What are the critical values chi squared subscript l and chi squared subscript r that correspond to a 95% confidence level and a sample size of 91?
a) Chi squared subscript l = 76.15, Chi squared subscript r = 107.52
b) Chi squared subscript l = 73.36, Chi squared subscript r = 123.23
c) Chi squared subscript l = 86.66, Chi squared subscript r = 117.63
d) Chi squared subscript l = 82.53, Chi squared subscript r = 110.77
