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.
Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater,
Positron emission tomography (PET) image showing the difference in the metabolic activity of the bra
Difference between....
Bell Curve for Intelligence IQ scores for a population-based sample usually fall into this kind of
"Practice makes perfect"
World Population Growth