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Category > Management Posted 02 Feb 2018 My Price 7.00

test of significance

State with reason whether the following statements are true, false, or uncertain. Be precise.

 

a. The t test of significance discussed in this chapter requires that the sampling distributions of estimators 1 and 2 follow the normal distribution.

b. Even though the disturbance term in the CLRM is not normally distributed, the OLS estimators are still unbiased.

c. If there is no intercept in the regression model, the estimated ui ( = i) will not sum to zero.

d. The p value and the size of a test statistic mean the same thing.

e. In a regression model that contains the intercept, the sum of the residuals is always zero.

f. If a null hypothesis is not rejected, it is true.

g. The higher the value of σ2, the larger is the variance of 2 given in (3.3.1).

h. The conditional and unconditional means of a random variable are the same things. i. In the two-variable PRF, if the slope coefficient β2 is zero, the intercept β1 is estimated by the sample mean .

j. The conditional variance, var (Yi | Xi) = σ2, and the unconditional variance of Y, var (Y) = σ2 Y, will be the same if X had no influence on Y.

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Maurice Tutor
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Status NEW Posted 02 Feb 2018 08:02 PM My Price 7.00

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