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.
Three ways that factors affect mortality in response to changes in population density.
Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater,
In 1993 Clinton succeeded in brokering a deal between Israeli prime minister Yitzhak Rabin (left) ...
Population and Settlement
World Population Growth
Population Growth in America