$7)$What classical method uses both the audited and book values of items in the sample to obtain an estimated total audited value?

Multiple Choice

$$ Discovery sampling

$$ Probability$-$proportional$-$to$-$size sampling

$$ Attributes sampling$($incorrect$)$

$$ Differences estimation sampling

$13)$Which statement is correct with respect to the monetary unit sampling technique?

Multiple Choice

$$ The technique insures that every account in the population has an equal chance of being selected.

$$ The technique automatically stratifies the population.

$$ The technique results in a representative sample every time.

$$ The technique allows the auditors to measure more precisely the risk of incorrect acceptance.$($incorrect$)$