Answer:
statistics
Step-by-step explanation:
Statistics is the science of collecting, organizing, analyzing, and interpreting data in order to make decisions. A population is the complete collection of all elements (scores, people, measurement, and so on) to be studied. The collection is complete in the sense that it includes all subjects to be studied.
Because most of the area under any normal curve falls within a limited range of the number line
4 hundreds equal 400 ones