Do one of the following as appropriate: A) find critical value za/2 B) find critical value ta/2 C) state that neither are normal nor t distribution applies.
Confidence level 90%;n=23;? is unknown; population appears to be very skewed
Find the critical value
a) Za/2 = 1.645
b)Ta/2=1.321
c)Za/2=1.28
d)Ta/2=1.717
e) Neither normal nor t distribution applies