# Math Help - Memory Refreshing

1. ## Memory Refreshing

I've done these excercises before, but It's not really fresh in my memory anymore..

Suppose $X_1,\cdots, X_n$ independant normal distributed stochasts with $\mu=5,\sigma^2=10$

How do we find c such that $P(5-c\leq \overline{X}\leq 5+c)=0.6$

2. Originally Posted by Dinkydoe
I've done these excercises before, but It's not really fresh in my memory anymore..

Suppose $X_1,\cdots, X_n$ independant normal distributed stochasts with $\mu=5,\sigma^2=10$

How do we find c such that $P(5-c\leq \overline{X}\leq 5+c)=0.6$
Start by getting the pdf for $\overline{X}$.