A novice investor would like to figure out which of three Digital Currencies $($Bitcoin$,$ Ethereum,

and Dogecoin$)$ they should invest $$1000$ in$.$ To do so they look at the daily returns of each of the

three currencies over the last $730$ days.

a$.$ Identify the population in this case.

b$.$ Identify a$/$the sample in this case.

c$.$ What is the variable of interest?

d$.$ Is this variable qualitative or quantitative?

e$.$ Give an example of $5$ responses we might observe in the sample.