What is meant by 'there is a correlation between pollen count and hay fever symptoms'?

It means that pollen count and hay fever are related in some way.

If it is positive correlation it means that as pollen count increases so does hay fever symptoms.

What is meant by 'there is a correlation between pollen count and hay fever symptoms'?
It means that if you draw a graph of increasing pollen count you will see a similar graph for the hayfever. They may well be related but not necessarily
Reply:1) Go to bookshelf

2) Locate large book entitled 'dictionary'

3) Look up 'correlation'

All will then become clear....
Reply:It means that the higher the pollen count the worse the hay fever symptoms.
Reply:there appears to be a trend between the pollen count in the air and amount of hay fever either going around or in one individual. remember, however, the correlation is not causation, and there could be another explanation for the hay fever that could explain the pollen count as well, or not.