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do one of the following as appropriate. (a) find the critical value za/2 (b) find the critical value
ta/2 (c) state that neither the normal nor the t distribution applies. Confidence level 95% n=18 o
is known population appears to be very skewed find the critical value
a.ta/2=2.110
b.za/2=1.96
c. ta/2=1.740
d.za/2=1.645
e. neither normal nor t distribution
Solution
Given a=0.05, the critical value is t(0.025,df=n-1=17)=2.11 (from student t table)
Answer: a.ta/2=2.110

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