In teleology, if there are individual costs but group benefits, then there are net gains,
and the behavior is judged to be ethical.
The way to interpret a confidence interval is as follows: If you repeated your survey
multiple times (literally, thousands of times), and plotted your p, or percentage, found
for each on a frequency distribution, it would look like a bell-shaped curve, and 95% of
your percentages would fall in the confidence interval defined by the population
percentage 1.96 times the standard error of the percentage.
The question "How many children do you have?" is an example of a question that is
about as crystal clear as a question can be.
Errors in the research process that pertain to anything other than sampling are referred
to as non-sampling errors.