Answer: 1.88
Step-by-step explanation:
The confidence interval for population mean is given by :-
[tex]\mu\ \pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}[/tex]
Given : Significance level : [tex]1-0.94=0.06[/tex]
Critical value : [tex]z_{\alpha/2}=z_{0.06/2}=z_{0.03}[/tex]
By using the standard normal distribution table for z, we find the critical value of [tex]z_{0.03}[/tex] corresponds to the p-value 0.03.
[tex]z_{0.03}=1.8807936\approx1.88[/tex]
Hence, the z-value that was used in the computation must be 1.88 .
