Agroup of researchers is measuring foot traffic in a museum. recently one half of the museum was redone in order to encourage more foot traffic. researchers are counting the number of attendees in this new zone and comparing it to other zones that have not been redone. on the first day that researchers are recording foot traffic, several buses of schoolchildren arrive at the museum unexpectedly for a field trip. after a day of testing, the new zone appears to be getting just as much foot traffic as the other zones. which problem is most likely affecting this quasi-experiment?
history threat
testing threat
maturation threat
selection threat

Which of the following will increase a population's growth rate? read the following scenario and answer the question(s) below. population growth is at the root of many serious environmental problems. from the ancient babylonians thousands of years ago, to thomas malthus two centuries ago, to present day neo-malthusians, humans seem to possess an awareness of earth's limitations in the face of growing populations. today, our ability to accurately quantify and monitor population growth is very sophisticated. we can measure growth and make predictions about world growth with mathematical and computer models. despite long-lasting, rapid global population growth that is only recently starting to show signs of slowing, we have thus far been able to avoid global catastrophe. can we continue to avoid disaster? which of the following will increase a population's growth rate? increased urbanization increased industrialization increased immigration decreased immigration increased emigratio

Anode is a point on a wave where there is no vibration. a.true b.false

Which country had the most spiritual influence on classical china? a) india b) japan c) korea d) mongolia