# Question: suppose you are interested in the population of all elementary...

###### Question details

Suppose you are interested in the **population of all
elementary school students in Missoula County**. Suppose
also that we collect information from a (non-random) sample of 30
elementary school students at a particular elementary school.
Identify each of the following as either a parameter or statistic.
Also include the appropriate corresponding symbol used to denote
it.

**a)**The average score
received on a standardized math test by the 30 students
sampled.

**b)**The standard
deviation of the standardized math scores for all elementary school
students in Missoula County.

**c)**The proportion of
elementary school students in Missoula County participating in
after-school programs.

**d)**The proportion of
the 30 students sampled who participate in after-school
programs.