A correlation coefficient of 0.948 suggests a strong positive relationship between age and sick days. This means that as age increases, the number of sick days tends to increase as well, showing a close, nearly linear relationship between the two variables.
A more simpler explanation:
Imagine your friends, when they get older, sometimes they might need more days off because they feel sick. The number of days they need off and how old they are seem to go up together. So, the older they get, the more likely they might need more sick days.