OK I have a normal distribution N(m,v) (mean and variance unknown) I have been given the values of the lower and upper quartiles of this distribution, they are 2/3 and 4. How do I find the mean and variance with just this information?
OK I have a normal distribution N(m,v) (mean and variance unknown) I have been given the values of the lower and upper quartiles of this distribution, they are 2/3 and 4. How do I find the mean and variance with just this information?
Use tables or technology to find the value of and such that and .
From :
.... (1)
.... (2)
Solve equations (1) and (2) simultaneously for and .