A researcher has conducted an independent experiment to investigate whether chewing gum measures design influences concentration. She recorded how many changes

A researcher has conducted an
independent
experiment to investigate
whether chewing gum
measures design
influences concentration. She
recorded how many changes
were detected in a 'spot-the-
difference' puzzle by people
chewing gum when completing
the task, compared to those
who were not. Use this
information to perform the
following tasks