8. If we use as an estimator of o² it is N but it can be corrected by a. biased, changing the numerator to e? b. non-linear, changing the denominator to N – 2 c. biased, changing the denominator to N...

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Extracted text: 8. If we use as an estimator of o² it is N but it can be corrected by a. biased, changing the numerator to e? b. non-linear, changing the denominator to N – 2 c. biased, changing the denominator to N – 2 d. non-linear, taking the log of each term. 9. If the sample variance of 4 observations of random variable Y is 2, then E(Y – Ý)² of these 4 observations is: а. 4 b. 6 с. 8 d. 16 10. If the assumption of normally distributed errors is violated, then the least square estimators b1 and b2 will be biased. a. TRUE b. FALSE