Answer:
144 i think
Step-by-step explanation:
She asked her friends, which does not represent a random sample.
She tried to show cause and effect without doing an experiment (which includes simple random sample, control group, treatment, etc).
So the answer is she did not use a random sample, and tried to show cause and effect with an observational study.
Answer:
15
Step-by-step explanation:
Just insert 3 wherever the z is at.
5 * (6 - 3)
5 * 3
= 15
