Posted by Cho (Please help me) on .
3. The average weekly allowance of students last year at a private high school was Php 800.00 per week, based on an enrollment of 2000 students. The junior high school students who did not have this information interviewed 50 students and found their average weekly allowance last year to be Php 700.00.
a.) Population:
b.) Sample:
c.) 2 Parameters:
d.) 2 Statistics:

Statistics 
PsyDAG,
A population is all the subjects, while a sample is only a portion of the subjects that is used to generalize to the population.
Parameters are measures on a population, while statistics are measures on a sample.
You have the n and mean for both.