Calculate the margin of error and construct the confidence interval for the population mean (you may assume the population data is normally distributed):
Standard Normal Distribution Table
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a. x̄ =99.4,n=70, σ =1.25, α =0.1
E=
Round to 3 significant digits
< μ < Round to 2 decimal places ________________________________________ b. x̄ =51.3,n=96, σ =12.6, α =0.05 E= Round to 3 significant digits < μ < Round to 2 decimal places