The question is about confidence interval, shown as below:

Consider the 95% confidence interval of the mean of i.i.d. random variables X,- (r' = 1, 2, . . . , n). We define the absolute error of the estimate 7(n) as V[X1] Absolute Error = 20025 When the distribution of X,- is F(x) given by the followings, what n should be set to in order to achieve the absolute error of 7(n) smaller than or equal to 102? (For simplicity. use the approximate of 20,025 2 2.0.) 1. Exponential distribution F(x) = 1 e'x/2 2. Pareto distribution F(x) 2 1 (1/x)2