Textbook Notes (270,000)

CA (160,000)

York (10,000)

PSYC (4,000)

PSYC 2030 (100)

Ronald Sheese (10)

Chapter 14

# PSYC 2030 Chapter Notes - Chapter 14: Central Tendency, Statistical Parameter, Categorical Variable

by OC179159

This

**preview**shows page 1. to view the full**4 pages of the document.**STATISTICS: ORGANIZING THE DATA

!

LEVELS OF MEASUREMENT

• Experimentation generates a large amount of raw data that

researchers must ﬁnd a way to summarize and analyse

• The manner in which the data are presented depends in part on

the type of variable used in the study

• There are two major classes of variables used in research:

categorical and measures

• Operational deﬁnitions imply certain ways of measure the

variables

• The way you analyze variables depends on the variables you are

using

• Categorical: measuring variables based on categories you put it

in rather than numbers

•Nominal: taken variable and give it names, the names do not

have quantities associated with them ie. Male/female

• Measure variable…quantitative

◦Ordinal- arranged in terms of order and magnitude, do not

say anything about the measures in between ie. 1st , 2nd,

3rd

◦Interval- they are in order but we say something about the

measures in between, idea is that the difference between 1

and 2 is the same as between 5 and 6, however not always

true, capture info about distance between observations as

well as order, does not have a true zero however , no

nothing point. (agree vs. disagree, no 0) ie. IQ scale

◦Ratio-! do have a true zero , ie. If you are going 30 km and

someone is going 60km, you can say they are going twice

your distance, can make comparisons of proportions

• Cannot change level of measurement after you collect data from

simpler to more complex measurement, if you collect categorical

data you cannot change it to ratio, however you can change ratio

data to ordinal, can only move from more complex scale to

simpler

###### You're Reading a Preview

Unlock to view full version