Table
Menu Item | Description |
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y Std. Dev | Standard deviation for y: a measure of how dispersed the y data values are about |
| the mean. |
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x Population Dev | Population Standard deviation for x: a measure of how dispersed the x data values |
| are about the mean, assuming the data constitutes a complete set of data. |
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y Population Dev | Population Standard deviation for y: a measure of how dispersed the y data values |
| are about the mean, assuming the data constitutes a complete set of data. |
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S.E.Samp.x | Standard error for the sample x: a measure of the dispersion of x mean, assuming |
| the data is a sampling of a large, more complete data set. |
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S.E.Samp.y | Standard error for the sample y: a measure of the dispersion of y mean, assuming |
| the data is a sampling of a large, more complete data set. |
Pred x
Pred y
Predicts x for a given hypothetical value of y, based upon the model calculated to fit the data.
Predicts y for a given hypothetical value of x, based upon the model calculated to fit the data.
a |
| The a coefficient for the chosen regression model, which is the slope for a linear | ||||
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b |
| The b coefficient for the chosen regression model, which is the | ||||
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c |
| The | c | coefficient for the chosen regression model, applies only for | 2 | . |
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| ax +bx+c | ||
Correlation | The correlation coefficient for the given (x, y) data. The correlation coefficient is a | |||||
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| number in the range | ||||
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| the data. |
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Covariance | A measure of how much two variables change in relation to one another. |
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Σx |
| The sum of the x values. |
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Σy |
| The sum of the y values. |
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Σx2 | The sum of the squares of the x values. |
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Σy | 2 | The sum of the squares for the y values. |
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Σxy | The sum of the products of the x and y values. |
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Quartiles* | The boundaries of a given frequency distribution divided into four parts. |
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Median* | The middle value in a given frequency distribution. |
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Maximum* | The largest value in a given frequency distribution. |
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Minimum* | The lowest value in a given frequency distribution. |
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*Does not apply to the HP 20b.
Statistical Operations 71