Sorry i don't know. i tried. Can you try and help me?
Answer:
I dont know.
Step-by-step explanation:
Answer: B. 
Step-by-step explanation:
The confidence interval for the population mean is given by :-

Given : Sample size : n= 100
Sample mean : 
Standard deviation: 
Level of confidence = 0.95
Significance level : 
Critical value : 
Then, 95% confidence interval for the population mean will be :-

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