Karen took three samples from a population of students to measure their average study time. A 3-column table with 3 rows. Column 1 is labeled Sample with entries Sample 1, Sample 2, Sample 3. Column 2 is labeled Predicted Mean with entries 34, 15, 29. Column 3 is labeled Actual mean with entries 28, 28, 28. Compute the variation of each predicted population mean from the sample means in the table.