Consider a study that intends to examine whether the colour red makes children act impulsively. A group of 500 children were assigned into two groups (Red and Green): group Red if the child came for a morning session, and group Green if the child came for an afternoon session. Each child was then led into a room that has a big button in the colour of their group and labelled "DO NOT PRESS ME!". It was recorded whether the child presses the button within 10 minutes. Each child was then given a candy for participating.

The children were also asked if they like candies. The following table summarises the data. For instance, 22 children from group Red that pressed the button do not like candies

Likes Candies Does Not Like Candies

red green red green

Pressed Button 3 135 22 1

Did not

Press Button 177 60 38 64

Q1. Is preference for candies associated with pressing the button in this study?

Q2. Is preference for candies a confounder in this study?