Question

A study of traffic safety shows a correlation of 0.57 between average speed of traffic and number of fatal accidents for a particular stretch of highway. This means that

a)drivers should speed up to get through this area as quickly as possible.

b)as speed increases, fatalities decrease.

c)fatalities tend to increase as average speed increases.

d)every 1 mile per hour increase in average speed increases the number of traffic fatalities by .57.

Answer 1

Answer)

Correlation is divided into three statements

Positive correlation

When both the variables goes in same direction

It exists from 0 to 1

No correlation

When there is no relationship in between two variables

Negative correlation

When both the variables goes in opposite direction

It exists from -1 to 0

As here correlation is 0.57 (positive)

So answer is

c)fatalities tend to increase as average speed increases.