Term
|
Definition
| The number of times that a value occurs in the data. |
|
|
Term
|
Definition
· a table showing each subject’s score from lowest to highest. |
|
|
Term
|
Definition
| : a display that shows how often certain variables occur or how often values of a specific variable occur. |
|
|
Term
|
Definition
| a frequency distribution in which most of the data are clustered around the mean; the so-called bell-shaped distribution. |
|
|
Term
|
Definition
Individual data point which falls outside the overall pattern of a graph |
|
|
Term
|
Definition
· : tail to the right; more scores in the lower range; mean and median are to the right of the mode. |
|
|
Term
|
Definition
· tail to the left; more scores in the higher range; mean and median are to the left of the mode. |
|
|
Term
|
Definition
a pattern of distribution where the left and right sides of the histogram are approximately mirror images of each other. |
|
|
Term
|
Definition
| measure of the average deviation or spread of scores around the mean |
|
|
Term
|
Definition
· used to analyze descriptively the spread of scores in a distribution; the greater the dispersion of scores around the mean, the greater the SD; mathematically speaking, it is the positive square root of the variance. |
|
|
Term
|
Definition
A description of the spread or variation (i.e. smallest to largest) of the data points in a data set. |
|
|
Term
|
Definition
| In any normal distribution, 68% of the data points or observations fall within one standard deviation of the mean, 95% fall within two standard deviations, and 99.7% fall within three standard deviations of the mean |
|
|
Term
|
Definition
| relationship between risk factors and disease |
|
|
Term
|
Definition
| implication that the risk factor(s) cause(s) the disease or outcome observed |
|
|
Term
| Correlational Study (Pearson “r” or Correlation Coefficient “r”): |
|
Definition
| ”): measures the strength of the relationship (association) between two variables; |
|
|
Term
|
Definition
· : used in case-control / retrospective studies, measures the odds of having the risk factor if the disease is present |
|
|
Term
|
Definition
| calculated in prospective studies; measures the risk that an individual will develop an adverse outcome over a specified time given the exposure; |
|
|
Term
|
Definition
The probability that a condition will be correctly identified by a test or index. The ability to detect a quality if it is present. |
|
|
Term
|
Definition
Ability of a test to distinguish between those who do and do not have a disease or condition. |
|
|
