These days, apt
is for humans whereas apt-get
is for scripts. apt
's output is designed for humans and may change between releases, whereas apt-get
is guaranteed to remain consistent to avoid breaking scripts.
apt
combines several commands together. For example, you can use it to install packages from both repos and local files (e.g. apt install ./foo.deb
) whereas apt-get
is only for packages from repos and you'd need to use dpkg
for local packages.
You really don't need to survey many people to get statistically significant results, assuming your sample is truly random. For a population of 340 million, you only need to randomly sample ~2500 people to get a 95% confidence interval with a 2% margin of error.
A sample of 9000 people would get you closer to a 99%+ confidence interval.