Atelevision newscaster reports, "we should have known the war in iraq was going to last forever! " what is this statement an example of?
a.) observer effect
b.) hindsight bias
c.) courtesy bias
d.) experimental contamination

Select the correct answer. what was edwin hubble's contribution to the field of astronomy? a. he discovered variable stars. b. he proved that the heliocentric model accurately described our solar system. c. he found a relationship between the period luminosity and distance of stars. d. he proved that the universe is finite. e. he discovered that the universe was expanding.