Question

which relationships would most likely be causal? select two options.
□ a negative correlation between the temperature and the amount of snow still on the ground
□ a negative correlation between the number of digital photos uploaded to a website and the amount of storage space that is left
□ a positive correlation between the length of the side of a pool and its depth
□ a positive correlation between the height of a woman and the height of her brother
□ a negative correlation between the volume of water in a pot and the amount of time that the water takes to boil

Explanation:

1. For "a negative correlation between the temperature and the amount of snow still on the ground": As temperature rises, snow melts, so temperature increase causes less snow. This is a causal relationship.
2. For "a negative correlation between the number of digital photos uploaded to a website and the amount of storage space that is left": More photos uploaded mean less storage space left, as uploading photos uses storage. This is causal.
3. "A positive correlation between the length of the side of a pool and its depth": Pool side length and depth are independent design choices, no causal link.
4. "A positive correlation between the height of a woman and the height of her brother": Height correlation is due to genetics but not a direct causal relationship (one's height doesn't cause the other's).
5. "A negative correlation between the volume of water in a pot and the amount of time that the water takes to boil": More water (higher volume) takes longer to boil, so this is actually a positive correlation (more volume → more time), so this option is incorrect.

Answer:

A. a negative correlation between the temperature and the amount of snow still on the ground, B. a negative correlation between the number of digital photos uploaded to a website and the amount of storage space that is left