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Residual |
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The vertical distance (deviation) between a pre-assigned value of y and its actual value. |
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Sample |
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A finite set of objects, drawn from the population with the aim that it represents the population. |
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Sampling Distribution |
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The distribution obtained by computing a statistic for a large number of sample drawn from the same sample population. |
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Scatter Diagram |
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If a graphic display used to explain the degree of correlation between two variables, by the means of points or dots. |
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Skewed |
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A distribution displayed at one end of the scale with its tail strung out at the other end. |
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Standard - Deviation |
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It is the square root of the arithmetic mean of the square of deviations of various values from their arithmetic mean. |
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Standard error |
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A measure of variation in random of a statistic standardize the conversion into a z-score. |
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Statistical Significance |
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The probability of obtaining a given result by chance. |
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Sample space |
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The totality of all outcomes as a result of a random experiment. |
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Statistic |
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It is a branch of mathematics that describes the aggregate of facts, affected to a marked extent by multiplicity of causes, numerically expressed, in numerated as estimated according to reasonable standard accuracy, collected in a systematic manner for a pre-determined purpose and placed in a relationship to each other. |
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Symmetric |
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A shape in which one side is the mirror image of other. |
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Systematic Error |
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The consistency in under-estimating or over-estimating a true value. |
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T- Distribution |
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A probability distribution used when the standard deviation of the population is unknown and the sample size is small. |
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Test statistic |
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A computed statistic value used to decide a hypothesis test. |
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Two-Tail-Test |
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A state of predictions that indicate whether the two values are equal or not equal. |
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Type-I-Error ( a Error ) |
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Rejecting a null-hypothesis when it is true. |
