It makes a difference whether or not we know the population variance because
a. we cannot deal with situations in which the population variance is not known.
b. we have to call the result t if the population variance is used.
c. we have to call the result z if the population variance is not used.
d. we have to call the result t if the sample variance is used.
Question 2
If the population from which we draw samples is rectangular, then the sampling distribution of the mean will be
a. rectangular.
b. normal.
c. bimodal.
d. more normal than the population.
Animal extinctions and human population growth.
The tiger, Panthera tigris, was historically found throughout much of Asia, but at low population de
Population of California poppy plants
Bacteria Population
population pyramid of Croatia
Human Population Growth