Given the following dataset, what is the first quartile? Round to the nearest tenth if necessary. 42, 82, 67, 34, 54, 62, 17, 47, 56, 18, 20

Answer 1

To find the first quartile, we first need to arrange the dataset in ascending order:
17, 18, 20, 34, 42, 47, 54, 56, 62, 67, 82

There are 11 numbers in the dataset, so the first quartile is the median of the first half of the data. Since 11 is an odd number, the median of the first half is the middle number, which is 20.

Therefore, the first quartile of the dataset is 20.