Types of Variables and Levels of Measurement Flashcards
phenomenon whose value remains the same
from person to person, from time to time, or
from place to place
Constant
information on any characteristic that can
vary
Variable
its values and categories cannot be measured with certainty because it changes over time
Variable
Give examples of constant
Value of pi
Gravity (g) = 9.8 m/s2
Speed of light
Avogradro’s number
Give examples of variable
smoking habits, age of gestation, weight,
educational attainment
Variables can be ______or _________ depending on the objective of the data collection
Qualitative, Quantitative
describe by features, generally by words
▪ categories are simply used as labels to distinguish one group from another
Qualitative
it cannot be used as basis to say that one group is greater or lesser, higher or lower, or better or worse than the other group
Qualitative
one whose categories can be measured or ordered according to quantity or amount
Quantitative Variables
Levels of Measurements
Nominal, Ordinal, Dischotomous, Interval, Ratio
variables that have no measurement scales
and no rank order
Nominal
examples of dichotomous
skin color, biological gender, health status
Examples of nominal
blood types, vegetable or fruit colors, marital status
is nominal quanti or quali?
quali
Represent categories, names, or labels (does not represent quantity; no implied order to the categories).
Nominal
Binary Variables. variables that only have two levels
Dichotomous
Dichotomous and Nominal Variables are sometimes called ______ because the different categories are completely separate from each other
Discrete Variables
variables that can be ranked or ordered either Qualitative or Quantitative, depending on the objective of the data collection
Ordinal
Examples of ordinal
severity of disease, physical activity, likert scale
better to worse or
highest to lowest
values are separated by equally spaced intervals and has no true zero point
interval
has standard units and are infinite
INterval
zero is _____ and does not indicate the absence of the quantity being measured
arbitrary; interval
interval can only be
added or subtracted
examples of interval
temperature in Celsius and Fahrenheit, IQ scores,
there is equal intervals between values and has true zero point
ratio
ratio can be
data can be added, subtracted, divided, and multiplied
Examples of ratio
height, weight, distance, temperature in Kelvin
Rank from most info to least info
R-I-O-D-N
Qualitative is also known as
Categorical data
Quantitative is also known as
Numerical data
From the Greek word, “___” means “in two”; “___”
means “to cut
Dicho; temnien
