N = $\frac { \sigma ^ { 2 } z ^ { 2 } } { D ^ { 2 } }$

Multiple Choice

n = $\frac { \sigma ^ { 2 } z ^ { 2 } } { D ^ { 2 } }$
Based on the above formula for sample size,sample size increases with increases in all of the items below except ________.

A) sample size increases with an increase in the precision level required of the estimate
B) sample size increases with an increase in the population variability
C) sample size increases with an increase in the degree of confidence
D) All of the above are true.Sample size increases with increases in all of the items above.