Find the critical value z_a/2 that corresponds to a 91% confidence level.

1) Find the critical value z_a/2 that corresponds to a 91% confidence level.
a) 1.645
b) 1.34
c) 1.75
d) 1.70
6) Find the critical value z_a/2 that corresponds to a 94% confidence level.
a) 1.555
b) 1.88
c) 2.75
d) 1.96

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