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 Standard Normal Curve The normal distribution is the bell curve (or normal curve). The standard normal curve is the normal curve with a mean of zero and a standard deviation of one. The probability that an observation falls into an interval I will be computed as the area of interval I under the normal curve.