Basics of Statistics Levels of Measurement

1. LEVELS OF
MEASUREMENT
SIR LY

2. OBJECTIVE:
•to identify and differentiate the
different levels of measurement and
methods of data collection

3. LEVELS OF MEASUREMENT
•NOMINAL
•ORDINAL
•INTERVAL
•RATIO

4. NOMINAL LEVEL
•A measurement arises when we have
variables that are categorical and non-
numeric or where the numbers have no
sense of ordering
EX.
Numbers on the uniform, Sex, Marital
status, religion affiliation, college major,
blood type

5. Ordinal level
•deals with categorical variables like the
nominal level, but in this level ordering
is important, that is the values of the
variable could be ranked (note: no zero
point and distance is not considered).
•Socio-economic status, educational
level, range of income, satisfactory
rating, grades

6. Interval Level
•tells us that one unit differs by a certain amount of
degree from another unit.
•It categorizes and ranks data
•introduces precise and continuous intervals.
•Temperature, Ph Scale, times of the day

7. Interval Level
•Interval data are measured using continuous intervals
that show order, direction, and a consistent
difference in values.
•The difference between values on an interval scale
is always evenly distributed.
•Interval datasets have no ‘true zero.
•frequency distribution; mode, median, and mean;
and the range, standard deviation, and variance of a
dataset

8. Ratio Level
•Highest of four hierarchical levels of
measurement
•The levels, or scales, of measurement
indicate how precisely data is recorded
•the higher the level, the more complex the
measurement is.
•categorizes and ranks data, and uses
continuous intervals

9. Ratio Level
•categorizes and ranks data, and uses
continuous intervals
•values can be categorized, ordered, have
equal intervals and take on a true zero.
•Height, age, weekly food consumption,
number of people in a household

10. Identify if it is nominal, ordinal, interval or ratio
1. Workplace status
2.Degree of pain
3. Blood type
4.Degree of sweetness
5.Political preference
6.Length of a pencil
7. Place you live
8.Usual sleeping time
9.Happiness index of the day
10.Brand of laundry soap