1) Choose the correct answer.

		if the estimates by the least square method are unbiased then: the estimated slope are randomly above and below the population slope.
		if the estimates by the least square method are unbiased then: the estimated slope is equal to the average population slope.
		if the estimates by the least square method are unbiased then: the estimated slope is equal to population slope.
		None of the other answers are correct.

2)

If all the classical assumptions hold, Then

		The estimated coefficients are equal to their actual value when the sample size become very large.
		The estimated coefficients have the smallest variance.
		The estimated coefficients are randomly above and below their actual (correct) values.
		All of the other answers are correct

3)

The estimated coefficients are efficient when:

		They have the lowest variance.
		Their average estimated sample value is equal to the actual value.
		They are equal to the actual value when the sample size become large.
		They are randomly above or below the actual value.