Reference no: EM133271517

1. Confounds the relationship between air pollution In this causal pathway and heart disease

weather

noise

traffic

smoking

2. Which of the following air pollutants are gas-phase (select all that apply)?

Elemental carbon

Ozone

Nitrogen dioxide

Sulfur dioxide

3. A batch of spinach distributed to a certain restaurant chain was contaminated with Salmonella bacteria. 1000 persons ate some amount of this spinach, and 400 of them were sickened. The odds of becoming sick from eating this product is therefore:

40%

0.33

2 to 3

60%

4. In children, height and reading ability are strongly correlated. What is the most likely explanation for this?

Increased height causes children to be more intelligent.

Reading more often causes children to be taller. The relationship between height and reading ability in children is confounded by age.

This is a random coincidence.

Which of the following are exposure routes for lead? (select all that apply)

Dietary ingestion

Inhalation

Dermal absorption

Drinking water ingestion