Final answer:
The minimum value is -6, the maximum value is -1. The first quartile (Q₁) is -5 and the third quartile (Q₃) is -1.
Step-by-step explanation:
The minimum value in the given set is -6, while the maximum value is -1. To find the quartiles, we first need to sort the data in ascending order: {-6, -5, -5, -5, -3, -2, -2, -1, -1}.
The first quartile (Q₁) is the median of the lower half of the data, which is -5. The third quartile (Q₃) is the median of the upper half of the data, which is also -1.