The Lower or First Quartile (Q1) signifies the midpoint between the smallest value in a dataset and the median. Essentially, it separates the bottom 25% of data from the top 75%. To locate it, one should organize the data in increasing order, then identify the median of the bottom half.
| Topic | Problem | Solution |
|---|---|---|
| None | The following table shows the five-number summary… | Find the first quartile (Q1) from the given table: \(Q_{1} = 5\) |
| None | The following table shows the five-number summary… | Find the value that corresponds to the 25th percentile, which is the first quartile, $Q_1$ |