1
$\begingroup$

Possible Duplicate:
Calculating mu and sigma (μ and σ) of a normal random variable

If I have a random variable X with parameters μ and σ unknown. It is known that $P (X \ge 75) = 0.7764$ and $P (X \ge 83) = 0.7291$ . With this information Is it possible to determine the μ and σ values ​​for $X$?

  • 0
    Duplicate: http://math.stackexchange.com/q/788542011-12-15
  • 0
    looks like homework.2011-12-15
  • 0
    If you pay attention before you say the question is "duplicate", you would notice that in the previous question the probabilities were reversed and it was therefore impossible to calculate =)2011-12-16

1 Answers 1