Question

A researcher believes that Cold FX reduces colds. Hence, people who take Cold FX should acquire fewer colds on average relative to people who do not. How would you translate this research problem into a testable hypothesis? First write down two populations of interest. Next, write down the research hypothesis. Finally, write a null hypothesis.

Answer 1

Population 1( ) :  people who take Cold FX

Population 2 ( )  :  people who do not take Cold FX

Research hypothesis : people who take Cold FX should acquire fewer colds on average relative to people who do not

i.e.,     <

Null hypothesis :  there is no difference between  people who take Cold FX and   who do not

i.e.,   =