The following stem - AND leaf displaLet's analyze the given stem-and-leaf plot for the scores of 19 students: Stem | Leaf ---- | ---- 5 | 4 6 | 3, 5, 8 7 | 4, 5, 7, 8 8 | 1, 2, 7, 8, 9 9 | 1, 1, 4, 9, 9, 9 a. **Interquartile Range (IQR):** - First Quartile (Q1): 75 (median of the lower half of the data) - Third Quartile (Q3): 88 (median of the upper half of the data) - \( \text{IQR} = Q3 - Q1 = 88 - 75 = 13 \) b. **Percentile rank of 94:** - Count of values less than 94: 17 - Percentile rank of 94: \( \frac{17}{19} \times 100\% \) c. **Median:** - Since there are 19 data points, the median is the 10th value, which is 87. d. **Mean:** - Sum all values and divide by the number of values (19). e. **First Quartile (Q1):** - \( Q1 = 75 \) f. **Mode:** - The mode is the most frequent value(s) in the data set. g. **Third Quartile (Q3):** - \( Q3 = 88 \) h. **70th Percentile:** - Since there are 19 data points, the 70th percentile