A negative result means the test did not detect elevated levels of altered DNA and/or hemoglobin that could be caused by cancer or precancer in the colon or rectum. The test can also have a negative result that is incorrect (false negative). This means the test result missed a potential cancer or precancer.For that reason, it is recommended that you schedule regular screenings.Your doctor may recommend an alternative screening method. Talk to your doctor about your test result.he test can also have a negative result that is incorrect (false negative). This means the test result missed a potential cancer or precancer. For that reason, it is recommended that you schedule regular screenings. Your doctor may recommend an alternative screening method. Talk to your doctor about your test result.
The new distribution of the normal random variable Z with mean `0` and variance `1` (or standard deviation `1`) is called a standard normal distribution. Standardizing the distribution like this makes it much easier to calculate probabilities.
The equation for the standard normal distribution is. \(f(x) = \frac{e^{-x^{2}/2}} {\sqrt{2\pi}} \). Since the general form of probability functions can be expressed in terms of the standard distribution, all subsequent formulas in this section are given for the standard form of the function.azard Function. The formula for the hazard function of the normal distribution is. \(h(x) = \frac{\phi(x)} {\Phi(-x)} \). where \(\phi\) is the cumulative distribution function of the standard normal distribution and Ï is the probability density function of the standard normal distribution.