A Study to Determine Whether or Not a Football Filled

question 20

Multiple Choice

A study to determine whether or not a football filled with helium traveled farther when kicked than one filled with air found that the football filled with helium went,on average,farther than the one filled with air.However,the difference was not statistically significant.What is the response variable in this study?

• A)The air or helium with which the football was filled
• B)The number of kickers
• C)The distance that the football traveled
• D)There is no response because the difference was not statistically significant.

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Definitions:

Target Cells

Specific cells affected by hormones or drugs due to the presence of particular receptors to which these substances bind.

Microbial Growth

The increase in number of microorganisms in a population due to reproduction, typically measured by colony forming units in microbiology.

Sebum

An oily substance secreted by sebaceous glands in the skin, responsible for lubricating and waterproofing the skin and hair.

Histamine

Amine released by mast cells and basophils that promotes inflammation.