2. Improvements in medication, sanitation, food supply allow for. in life expectancy
in child mortality rates

Results. The study revealed that a 1% increase in access to improved sanitation would reduce infant mortality by a rate of about two infant deaths per 1000 live births.

lol idk man i guess u gotta ask bill nye the science guy

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.