The electro-motive force (emf) of batteries produced by a company is normally distributed with mean and variance of 45.1 and 0.0016 respectively .
If 4 such batteries are connected in series ,find the 50% confidence interval of the mean emf .How do you explain the results to a non-statistician ??
We are already given the mean and the variance of the population .
So here what is meant by 50% confidence interval ?
Can somebody help me to answer this question ?