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What is a measure of the explanatory power of the regression model?
Wiki User
∙ 9y ago
Regression analysis describes the relationship between two or more variables. The measure of the explanatory power of the regression model is R2 (i.e. coefficient of determination).
Wiki User
∙ 9y ago
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How can measure the gain of an antenna?
ratio of transmitted power and received power
How can you measure the power or voltage of a potato clock?
A voltmeter would measure the voltage. If you measure the voltage drop over a known low resistance you get a kinda-sorta idea of the power available.
How do you make a working model of nuclear power plant?
You would not be able to obtain the fissile material necessary to build a working model of a nuclear power plant. You could build a model, for sure, but it would not be a working model.
What is 5280W to Kilovolt Ampere?
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1,000,000V is not a measure of power. You need the amperage in the equation to figure out the power (wattage). W = A x V
Why are your predictions inaccurate using a linear regression model?
There are many possible reasons. Here are some of the more common ones: The underlying relationship is not be linear. The regression has very poor predictive power (coefficient of regression close to zero). The errors are not independent, identical, normally distributed. Outliers distorting regression. Calculation error.
What is multiple and partial correlation?
multiple correlation: Suppose you calculate the linear regression of a single dependent variable on more than one independent variable and that you include a mean in the linear model. The multiple correlation is analogous to the statistic that is obtainable from a linear model that includes just one independent variable. It measures the degree to which the linear model given by the linear regression is valuable as a predictor of the independent variable. For calculation details you might wish to see the wikipedia article for this statistic. partial correlation: Let's say you have a dependent variable Y and a collection of independent variables X1, X2, X3. You might for some reason be interested in the partial correlation of Y and X3. Then you would calculate the linear regression of Y on just X1 and X2. Knowing the coefficients of this linear model you would calculate the so-called residuals which would be the parts of Y unaccounted for by the model or, in other words, the differences between the Y's and the values given by b1X1 + b2X2 where b1 and b2 are the model coefficients from the regression. Now you would calculate the correlation between these residuals and the X3 values to obtain the partial correlation of X3 with Y given X1 and X2. Intuitively, we use the first regression and residual calculation to account for the explanatory power of X1 and X2. Having done that we calculate the correlation coefficient to learn whether any more explanatory power is left for X3 to 'mop up'.
Is it true that an effective sociological theory may have both explanatory and predictive power?
yes
The explanatory power of a scientific theory is most closely linked to its capacity to generate testable?
Predictions
What are the Jones and modified Jones model of aggregate accruals in earnings management?
The original Jones model of non-discretionary accruals was developed by J. Jones in a 1991 paper in which she asserted that firms under the scope for import relief would engage in income-reducing earnings management. It is a cross-sectional regression model: Non-discretionary accruals = OLScoeff(1)(1/Assets) + OLScoeff(2)(chg in Rev) + OLScoeff(3)(gross PPE) + error of estimates This original model has been refined many times to include the modified-Jones model which tweaks the second factor changing it from OLScoeff(2)(chg in Rev - chg in Rcvbls) Both are among the several regression tests for earnings management but the limitation of all regression tests of EM is that (1) the power of the tests are generally low (partially explain variation if and when detected), and (2) they are all ex post measures (lagging). Additional models include the industry model and the Healy model.
The explanatory power of a scientific theory is most closely linked to its capacity to generate testable logic?
indepedent variable
Why wattmeter measure the reactive power?
A watt meter will measure active power, not reactive power.
What has the author Dennis Leech written?
Dennis Leech has written: 'Econometric evidence on LDC exports' 'Power relations in the international monetary fund' 'Power indices and probabilistic voting assumptions' 'An application of random coefficient regression' 'A note on testing the error specification in nonlinear regression' 'The relationship between shareholding concentration and shareholder voting power in British companies' 'The separation of corporate ownership and control'
The unit used to measure electrical power is the?
The Watt is the unit used to measure electric power :)
What exactly does a dynamometer measure?
A dynamometer measures force, torque, and power. It can be used to measure the power of an engine.
How do you change a camshaft position sensor on a 1998 Chevy Malibu 3.1L 7X?
it is located behind the power steering pump. You need to remove the power steering pump and the rest is self explanatory.
What has the author Zacharias Psaradakis written?
Zacharias Psaradakis has written: 'Regression-based tests for persistence in conditional variances' 'On the power of tests for superexogeneity and structural invariance'
