A medical study followed 13 heart patients who had received electronic pacemakers. The time in ( months ) to the first electrical malfunction was recorded. 12 22 18 14 3 15 8 18 28 5 10 20 28 Assume the population is normally distributed ( Round your answers to the nearest thousandth ) Question 11 Calculate the estimated standard error of the mean. Blank 1 Blank 1 Add your answer Question 12 Determine the critical value t for a = 0.02. Blank 1 Blank 1 Add your