For each of the following confidence levels, determine the corresponding Z score.
Confidence Level  Alpha  Area Beyond Z  Z score 
95%  0.05  0.0250 

94%  
92%  
97%  
98% 
The Z score
Formula:
The relationship between confidence interval and level of significance (the probability of error) is:
C.I = 1 –
Calculation:
For the confidence interval 94%, the alpha value is:
The next step to find the Z score, one has to divide the
Here, for
Therefore, the Z score beyond which lies a proportion of 0.03 of the total area is
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