Which of the following statements describes sampling error? The discrepancy between the sample mean and the sample standard deviation.
The discrepancy between the observed mean of one group in the sample and
the observed mean of another group in the sample.
The discrepancy between a sample estimate of a population parameter and the
real population parameter.
The discrepancy between two population parameters of interest.

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

no solution

step-by-step explanation:

there is not enough information in the problem to solve.