Final answer:
The shortest 10% of songs fall below the 10th percentile. In this case, the correct answer is the 90th percentile, as it represents the length above which the top 10% of songs fall.
Step-by-step explanation:
The percentages refer to percentiles, which are values below which a certain percentage of observations fall.
The shortest 10% means we are looking for a value below which 10% of the songs fall, which is the 10th percentile. However, there is often confusion between percentiles and quartiles.
Since percentiles divide the data into 100 equal parts, the 10th percentile would be the value below which 10 percent of the observations lie. This is different from a quartile, which divides the data into four parts. If the data is below a certain value, then 10% is shorter than that value.