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Psychological statistics is application of formulas, theorems, numbers and laws to psychology. Statistical methods for psychology include development and application statistical theory and methods for modeling psychological data. These methods include psychometrics, factor analysis, experimental designs, and Bayesian statistics. The article ...
The name of this formula stems from the fact that is the twentieth formula discussed in Kuder and Richardson's seminal paper on test reliability. [1] It is a special case of Cronbach's α, computed for dichotomous scores. [2] [3] It is often claimed that a high KR-20 coefficient (e.g., > 0.90) indicates a homogeneous test. However, like ...
In practical application, for instance in self-management, [3] [4] in coaching, [5] in leadership training, [6] or in change management, [7] the 3C-model can be used for systematic diagnosis of motivation deficits and intervention. Fig. 2. Practical application of the 3C-model: Motivation diagnosis (e.g. of a team member/ an employee).
The cumulative frequency is the total of the absolute frequencies of all events at or below a certain point in an ordered list of events. [1]: 17–19 The relative frequency (or empirical probability) of an event is the absolute frequency normalized by the total number of events:
The item-total correlation provides an index of the discrimination or differentiating power of the item, and is typically referred to as item discrimination. In addition, these statistics are calculated for each response of the oft-used multiple choice item, which are used to evaluate items and diagnose possible issues, such as a confusing ...
The debt service coverage ratio provides a useful indicator of financial strength. Standard & Poors reported that the total pool consisted, as of June 10, 2008, of 135 loans, with an aggregate trust balance of $2.052 billion. They indicate that there were, as of that date, eight loans with a DSC of lower than 1.0x.
The term law of total probability is sometimes taken to mean the law of alternatives, which is a special case of the law of total probability applying to discrete random variables. [ citation needed ] One author uses the terminology of the "Rule of Average Conditional Probabilities", [ 4 ] while another refers to it as the "continuous law of ...
For example, the arithmetic mean of and is + =, or equivalently + =. In contrast, a weighted mean in which the first number receives, for example, twice as much weight as the second (perhaps because it is assumed to appear twice as often in the general population from which these numbers were sampled) would be calculated as 3 ⋅ 2 3 + 5 ⋅ 1 ...