A researcher is interested in whether there are changes in child aggression after they watch another child get something

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A researcher is interested in whether there are changes in child
aggression after they watch another child get something that they
want. She devises an experiment where children come into her lab
and are given broken, worn toys to play with. After a short time, a
new child is brought into the room and is given new, shiny toys to
play with. The researcher wants to know whether there are changes
in aggressive behavior among the children with the broken, worn
toys after they see the new children playing with new, shiny toys.
To do this, she measures the number of aggressive behaviors
displayed by the children who were given the worn, broken toys both
before and after they watch the new children playing with new,
shiny toys. Her findings are summarized in the table below. *show
your work.
Child = Before - After
A 16 - 18
B 10 - 11
C 17 - 19
D 4 - 6
E 9 - 10
F 12 -14
a. Identify the IV, IV levels, and DV.
b. State null and alternative hypotheses.
c. Conduct a statistical test of the hypothesis
tobt =
d. Decide whether to reject or retain the null hypothesis.
e. Interpret your results.