Answer:
The 95% confidence interval
Step-by-step explanation:
From the question we are told that
The sample mean is 
The standard deviation is 
The sample size is n = 8
Given that the confidence level is 95% then the level of significance is

=>
Generally from the normal distribution table the critical value of
is
Generally the margin of error is mathematically represented as

=> 
=> 
Generally 95% confidence interval is mathematically represented as
=>
=>
Answer:
b is the answer
Step-by-step explanation:
When you subtract by zeros the same number comes out