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A Study Conducted at Cornell University Concluded That a Possible

question 57

Multiple Choice

A study conducted at Cornell University concluded that a possible link existed between TV viewing and autism in children.Researchers looked at two factors leading them to their conclusions.First, the researchers looked at autism rates in specific counties.Results indicated that as rainfall increased, so too did rates of autism, and conversely as rainfall decreased, so too did rates of autism.The researchers found this interesting because prior research reported that children watch more TV when it is raining.Second, the researchers looked at the percentage of households with cable TV subscriptions.Results indicated that as cable TV subscriptions increased, so too did rates of autism, and, conversely, as cable TV subscriptions decreased, so too did rates of autism.The researchers combined these two results to conclude there is a link between watching TV and autism.However in this study, population size was an) ____________ variable that needed to be considered.

Definitions:

Aquifer

A subsurface layer of permeable rock, rock fractures, or loose materials like gravel, sand, or silt, capable of holding water from which groundwater can be drawn.

Surface Runoff

Water flow that occurs when soil is saturated or impermeable and excess water from rain, meltwater, or other sources flows over the land.

Infiltration

The process through which water on the ground surface enters the soil.

Diagram

A simplified drawing or plan that represents ideas, structures, or systems, typically with labels and annotations.