# ACET: Statistics Glossary D to K

Get top class preparation for ACET right from your home: get questions, notes, tests, video lectures and more- for all subjects of ACET.

## Statistics Glossary: D to K

• Data: The numerical information collected of variables.
• Degree of freedom: The number of classes to which the value can be assigned arbitrarily or at will without violating the restrictions and limitations placed on the numbers of independent constraints in a set of data.
• Dependent: Events whose occurrence or non-occurence doesn՚t affect the occurrence of the other event.
• Event Dependent Variable: Variable which is cause or influence by another variable in a given phenomenon.
• Descriptive Statistics: The numerical data which describes phenomena.
• Directional Test: A test, used to compare two statistical values and predict that one is higher than the other or vice-versa.
• Discrete Variable: A variable not capable of assuming all values in a given range or a variable which can be measured only by means of whole numbers.
• Disjoint Occurrence: Two outcomes which doesn՚t happen simultaneously or which have nothing in common.
• Distribution: Collection of measurements expressing how scores tend to spread over a measurement scale
• Dispersion: The scatter or variability of the data about a given Central tendency.
• Frequency: A diagram which displays the number of measures falling into different Histogram classes.
• Frequency polygon: It is a graphic display in which frequencies are plotted against mid-points of the class-intervals & the points thus obtained, are join by a line segment.
• Fiducial limits: The confidence limits are also known as Fiducial limits
• Favorable Events: The trials, which entail the happening of an event, are favorable to the event.
• Grouped Data: A set of values belonging to different groups.
• Histogram: Graphic display of the frequency of a phenomenon.
• Independent Variable: A variable that causes or influences another variable.
• Independent Event: An event, whose occurrence or non-occurence, doesn՚t effect the occurrence of the other event in any way.
• Inference: Conclusion about a population parameter based upon the analysis of a sample statistic (sample being drawn from same population) .
• Inter-Quartile Range: It is the difference between the upper (Q3) and the lower quartile (Q1) inclusive.
• Interval: A scale, which uses numbers to rank order.
• Intercept: The value of the ordinate (Y) at which a straight line crosses the vertical axis.
• Joint Occurrence: An occurrence in which two outcomes happen simultaneously (AB or ACB) .
• Kurtosis: It is the degree of flatness or peakedness, in the region of the mode of frequency curve.