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Answer: 1.960
Step-by-step explanation:
The value of z we use to calculate a confidence interval with a (
) confidence level is a two-tailed test value i.e. represented by :-

Given : The level of confidence: 
Then, significance level : 
With the help of standard normal distribution table for z , we have

Hence, the value of z should be used to calculate a confidence interval with a 95% confidence level =1.960
MAE - 48 = 36 x 2
mAE - 48 = 72
mAE = 120
Answer
120
Answer:
I think it's B.)
Step-by-step explanation: