The data sets below include four random sample of pulse rates, in beats per minute. Each sample includes the pulse rates for 7 individuals. Use the Range Rule of Thumb to find an estimate for the standard deviation, then determine which sample has the largest amount of variation. Select the correct answer below: Sample 1 64, 78, 54, 102, 76, 86, 56 Sample 2 100, 90, 70, 70, 78, 70, 94 Sample 3 70, 66, 50, 72, 66, 64, 54 Sample 4 78, 36, 102, 68, 66, 56, 70