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ECO356
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1. The sample correlation coefficient, rxy, is defined by replacing the ____ covariance and variances by their unbiased estimator

	--->> population

	      zero

	      non-variable

	      sample

2. Randomisation is used to reduce bias and to allow the results of the sample to be generalised to the ____ from which the sample was drawn

	      modelling

	      equation

	      data set

	--->> population

3. Like variance and covariance, the correlation coefficient comes in two forms of ____ and sample

	--->> population

	      model

	      variables

	      mean

4. Because the sample mean is automatically in the centre of the sample, the deviations from it tend to be ____ than those from the population mean

	      higher

	--->> smaller

	      varied

	      All of the Options

5. Most of the ____ is a direct extension of the simple regression model but only has two new dimensions

	      equations

	--->> multiple regression analysis

	      data

	      models

6. ____ are also obtained in the same manner as in simple regression analysis and equally based on the number of degree of freedom

	      Multiple rgression

	      t test

	--->> confidence intervals

	      None of the Options

7. The Gauss–Markov  conditions usually assumes that the disturbance term is normally ____

	      zero

	      two variables

	      varied

	--->> distributed

8. The estimation of each parameter in a _____ equation consumes one degree of freedom in the sample

	      model

	      simple

	      gradient

	--->> regression

9. _____ may indicate that two variables are associated with one another, but it does not give any idea of the kind of relationship involved

	      regression equation

	      regression model

	--->> correlation coefficient

	      regression analysis

10. If there is an exact _____ linear relationship Pxy will assume its maximum value of one

	      equation of

	--->> positive

	      negative

	      value of