College 1st Year Class Notes in Mathematics Statistics

STATISTICS

, 2. Classifications of Statistics
a) DESCRIPTIVE STATISTICS - Is a manner of
organizing, presenting or summarizing a set of data or
observations in an informative way. (Describe the data)
Examples:
a) In a class of 40 students, we may summarize ho
many are males and How many are females.
b) How many of the students graduated from public
private schools?

,b) INFERENTIAL STATISTICS - proceeds from conducting a
study of a subset taken from a population. (Sample).
( only portion, part, percent (%) of the population)


Examples: a) From that 40 students, we will get only a
sample from that to make a Study.
b) From the students graduated from public
and private schools, we will get only a
sample from that to make a study.
c) Out of 100 BA students, we will get only 5% to
representin a survey.

, Practice Exercise 1: 25points

Determine whether D - Descriptive or I - Inferential
statistics:
1. From the PLMar graduates batch 2020 , the percenta
of having job.
2. The Monthly Salary of PLMar employees.
3. The ages of the students of PLMar.
4. 40% of the respondents are male.
5. The survey composed of BSBA students from PLMa