I the Higher the Degree of Confidence, the Larger the Sample

i. The higher the degree of confidence, the larger the sample required to give a certain precision.
ii. To determine the size of a sample, the standard deviation of the population must be estimated by
Either taking a pilot survey or by approximating it based on knowledge of the population.
iii. One factor in determining the size of a sample is the maximum allowable error that you must
Decide on. It is the maximum error you will tolerate at a specified level of confidence.

A) (i) , (ii) , and (iii) are all correct statements.
B) (iii) is a correct statement but not (i) or (ii) .
C) (i) and (iii) are correct statements but not (ii) .
D) (ii) and (iii) are correct statements but not (i) .
E) (i) , (ii) , and (iii) are all false statements.