2. A normal level glucose control (80 - 105 mg/dL) was tested at the beginning of the morning shift at a local hospital. The reagent used was of the same lot number, the instrument operator was the same, and all conditions were controlled to ensure the results would not be affected by environment or by any condition that could be controlled. The following values were recorded in 12 consecutive days. Calculate the Standard error of the mean (SEM) Days 1 2 3. 4 5 6 7 8 9 10 11 12 Glucose levels (mg/dL) 92 93 92 90 89 87 88 89 88 92 88 91