Public Health Degrees. Public health programs focus on protecting and improving the health of communities. Students in these programs learn to conduct disease-related research and analyze the effects of genetics and the environment on an individual's health.
What is a 'Z-Score'. A Z-score is a numerical measurement of a value's relationship to the mean in a group of values. If a Z-score is 0, it represents the score is identical to the mean score. Z-scores may also be positive or negative, with a positive value indicating the score is above the mean and a negative score indicating it is below the mean. Positive and negative scores also reveal the number of standard deviations the score is either above or below the mean.
We have: The area represented by `1.45` standard deviations to the right of the mean is shaded in green in the standard normal curve above. You can see how to find the value of `0.4265` in the full z-table below. Follow the `1.4` row across and the `0.05` column down until they meet at `0.4265`.