____ Are Small Dark Nebulae Less Than 1 Parsec in Diameter

question 21

Multiple Choice

____ are small dark nebulae less than 1 parsec in diameter that contain 10 to 100 solar masses.

• A) HI regions
• B) HII regions
• C) Emission nebulae
• D) Bok globules
• E) Reflection nebulae

---

Definitions:

Qualitative Variables

Variables that express qualitative attributes and differentiate by category, not in numerical terms.

Chi-Square Test

A nonparametric test used to determine if there is a significant association between two categorical variables.

Sampling Distribution

The probability distribution of a given random-sample-based statistic if you repeatedly sample from the same population.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution, influencing the shape and range of possible outcomes.