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Dec4-10, 10:39 PM
P: 15,203
For a function F(z) to qualify as a CDF,
  • The function must be monotonic: F(z) ≥ F(a) for all z>a
  • The function must be zero at the low end of the range: F(zmin) = 0
  • The function must be one at the high end of the rangeL F(zmax) = 1.

Given that, does your result look like a CDF?

A couple of hints:
1. Your limits of integration aren't right.
2. What values can z take on? Can it be a large negative number? A large positive number? Zero?