7, 12, 33, 33, 34, 37, 38, 40, 40, 41, 47, 51 2. The sample mean is about (a) 34.00 (b) 12.30 (c) 34.42 (d) 12.85 (e) 41.25 3. The sample standard deviation of the dataset is about (a) 165.17 (b) 12.30 (c) 34.42 (d) 12.85 (e) 151.41 4. The sample median of the dataset is (a) 37.50 (b) 37.00 (c) 34.42 (d) 12.85 (e) 41.25 5. The percentile rank of the measurement 40 is (a) 67 (b) 75 (c) 90 (d) 95 (e) 87