i sixsigma
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To construct a confidence interval using the given confidence level, do whichever of the following is appropriate. (a) Find the critical value z_alpha/2
,
(b) find the critical value t_alpha/2, or (c) state that neither the normal nor the t distribution applies.
choose the correct answer below.
a. z_alpha/2 = 1.96
b. t_alpha/2 = 1.660
c. t_alpha/2 = 1.984
d. z_alpha/2 = 1.645
e. Neither the normal nor the t distribution applies.
