Some people prefer to have a man as the pilot of the plane they are flying in because of gender bias. In reality though, a pilot has often been a man for most of the times since the invention of the plane.
<span>She is demonstrating
an attitude of skepticism. This is an attitude of which a person tries to doubt
a specific information or question and having to ask whether the claims is true
or not, whether if it is possible or not and whether an information is valid or
not.</span>
The answer that fits the blank is the term CHANCE. There would always be variability between the groups because of the variability of the given samples and how these samples are being treated in the first place. This is when chances enter.