[Solved]Is a stats question,just need some clarity on it-"total width of less than 2. 1. The problem statement, all variables and given/known data Hi.The result of a memory test is known to be normally distributed with mean mew and standard deviation 1.0. It's required to have a 95% confidence interval for mew with a total width of less than 2.0.Find the least possible number of tests needed to achieve this.*The "total width of less than 2.0" mean what? 2. Relevant equations ? 3. The attempt at a solution P(Z<2.0)=0.95 (X-mew)/(1.9/n^.5)<2.0,where X=the mean mew<2.0 I'm stuck here,I'm sure something is wrong with it.So pls explain the thing with the * above?