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) All statements are false

Question

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) All statements are false

Quizplus · Accepted Answer

All three statements are correct. A higher degree of confidence requires a larger sample size for precision. Estimating the population's standard deviation is necessary for determining sample size, and the maximum allowable error is a key factor in sample size determination.

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