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.

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.