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Mathematical Expectations |
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The sum of the products of values of a variable and their respective probabilities |
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Measures of Central Tendency |
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The descriptive measures which indicate the centered values of a set of observations. |
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Measure of variation |
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It is the descriptive measures which points out the spread of values in a set of values. |
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Median (Q2) |
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The value or the size of the central item of the arranged data or the middle i.e. 50th percentile of the ordered distribution. |
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Mode |
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It is the size of the item which occurs most frequently in a distribution. |
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Mutually Exclusive |
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Outcomes such that the occurrence of one preclude the occurrence of the other. |
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Moments |
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The arithmetic mean of the various powers of the deviations in any distribution. |
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Negative Relationship |
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In a relationship between two variables when one increases the other decreases or vice - versa. |
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Nominal |
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A scale using numbers, symbols, or titles to designate the different sub-class. |
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Normal Distribution |
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It is the limiting form of the binomial distribution when the number of trials is very large and the probability of success and failure is very small. |
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Non-parametric Test |
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Statistical test used, when the population cannot be assume to be normal or when the level of measurements is ordinal or less. |
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Null- Hypothesis |
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The opposite or reverse of the researcher's hypothesis. |
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Ogive |
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A graphic representation, that displays a running total. |
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One-Tail Test (One sided Test) |
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A test that predicts that one value is higher than the other. |
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Ordinal |
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It is a scale which uses numbers or symbols to rank the intervals are unspecified. |
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Out-lier |
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The points of the data, that fall far away from most of the other points of the data. |
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Parameter |
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A characteristic of population. |
