For each study described below, comment on the extent to which inferences can be drawn about a larger population and whe

[answerhappygod]

For each study described below, comment on the extent to which
inferences can be drawn
about a larger population and whether cause and effect can be
established.
Part A A basketball coach thinks lessons in dance will improve the
agility of his players
and thereby reduce injuries. To test his theory, he hosts an
optional weekly dance
practice for any of his players that wish you participate. At the
end of the season, he
compares agility for those athletes who participated in dance
training and those who
did not. (8 points)
Part B A student wishes to determine if staying up all night
“cramming” for an test
improves performance. She explores this question by asking everyone
in her Calculus
class to write down on a piece of paper his or her score on a
recent test and total
number of hours of sleep he or she got on the last three nights
before taking the test. (8
points)
Part C Does Lysine, a popular over-the-counter cold sore remedy
that claims to reduce
the length and severity of cold sores really work? A consumer
advocacy group addresses
this question by asking a random sample of 250 adults how many cold
sores they’d had
in the last six months, how long each cold sore lasted, and if they
took Lysine to treat
the cold. (8 points)
notes: Question 2 causation is difficult to assert,
correlation does not imply causation. In each of the three
scenarios there are also sampling methods to consider - in A it is
voluntary, this creates other issues for the experiment, in B it is
a convenience sample