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.
Flipper tags have been extensively used in the study of penguin population dynamics.
Population growth and growth rate, 1950 - 2100
The Great Spike in World Population Growth
A graphic depiction of predisposing alleles characteristic of a threshold trait within a population,
Age-Standardized Suicide Rates (per 100 000 Population), Both Sexes, 2016
HIV in population worldwide