Solution:
Standard Error Formula:
SEx̄ = S / UNDERROOT N
where,
SEx̄ = Standard Error of the Mean
s = Standard Deviation of the Mean
n = Number of Observations of the Sample
SExĚ„ = 51.60/ âš21 = 11.26004314
So, standard error = 11.26004314
The method which would accurately estimate this percentage
is number 4. Since, the target participants of the survey are people of the town,
the best way to get answers is to give every chance to all to share their
opinions regardless of age or status.