# Linear regression

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Related to regression line: regression analysis, correlation coefficient

## Linear regression

A statistical technique for fitting a straight line to a set of data points.

## Linear Regression

A statistical technique in which one takes a set of data points and plots them on a line. Linear regression is used to determine trends in economic data. For example, one may take different figures of GDP growth over time and plot them on a line in order to determine whether the general trend is upward or downward.
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Correlation matrices with regression lines are very useful for this.
2 the relations of determination between PAPs and each of the variables PVR, Systolic BP/24h and CO, are graphically represented by the regression line in squares A, B, C in comparison with the parabola-type regression in the squares A', B', C'.
Many software programs provide not only the formula for the regression line but they also provide an indicator for the goodness of fit of the regression line with the data, the so called [R.
The dashed line indicates the regression line (after exclusion of outliers).
Chi-square ([chi square]) goodness of fit values with the degrees of freedom (df) and probability levels (P) for the co-incidental and parallel probit regression lines of 4 responses on log Bt concentration, with the [LC.
As the results show, the regression lines for steel fiber mixtures were all above the regression line for non-steel fiber reinforced mixture, indicating that the steel fiber additions increased the flow resistance of WMS even though the trend was not consistent.
Tachycardiac and bradycardic responses ([DELTA]HR) against [DELTA]MAP were fitted using separate regression lines for both C57 and SOD1 animals (n = 8/group), respectively.
The R2 values for these regression lines are 1 1 0.
While there is no particular reason to believe that the disparate periods in the Other category are organically related, it is nonetheless striking that a regression line for these data shows an inverse relationship not very different from the Early 20th Century and postwar periods, which highlights Samuelson and Solow's claim that the Depression is sui generis.
The normal equations show that the regression line in Figure 1 passes through the sample mean of both salary ([bar.
2] kernels/ear, indicated that the regression line intercepted the Wr axis above the origin and denoted additive type of gene action with partial dominance controlling the inheritance pattern of this trait.
The slope of the linear regression line is referred to as the critical power (CP), and it is defined theoretically as the highest power attainable during exercise without exhaustion [2].

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