Let X be a normally distributed variable with unknown parameters μ and σ (sigma). If we know that P (X ≥ 75) = 0.7291 and P (X ≥ 83) = 0.7764. With the information given Is it possible to determine the values for μ and σ ?. It is possible these odds?, Personally I see no sense to this probabilities? because I believe that the resulting values of these probabilities are simply not possible. Am I right?
P (X ≥ 75) = 0.7291 and P (X ≥ 83) = 0.7764