Page 121 - Quantitative Data Analysis

Quantitative Data Analysis
Simply Explained Using SPSS

X = hours of training
Y = number of accidents

A
cc
id
e
nt
s

Hours of Training
Negative Correlation–as X increases, Y

decreases

Correlations can be either positive or negative

Positive correlation is when one variable increases and other
variable also increases.
– Positive: Effort and Achievement – People who expend more
effort t tend to achieve more.

– Negative: Cholesterol level and life expectancy – People with
lower cholesterol levels tend to live longer.

Negative correlation is when one variable increases and other
variable decreases.

1. A correlation of 1 represents a perfect positive relationship.

The Theory and Applications of Statistical Inferences 105