hw2_explained_sol.  University of California, Berkeley STAT MISC

# NO CODE
from datascience import *
from prob140 import *
%matplotlib inline
import matplotlib.pyplot as plt
plt.style.use('fivethirtyeight')
import numpy as np
from scipy import special
Homework 2 - Extended Solutions
Instructions
In all Stat 88 homework, you will be providing written answers, not code. We encourage you to hand-write your
answers. You can LaTeX your answers if you wish, but staff will not be able to assist you with LaTeX related
issues. It is your responsibility to ensure that the homework is submitted completely and properly to
Gradescope. Refer to the bottom of the notebook for submission instructions.
How to Do Your Homework
The point of homework is for you to try your hand at using what you've learned in class. The steps to follow:
Go to lecture and sections, and also go over the relevant text sections and discussion sections before
starting on the homework. You should not expect to simply remember all the ideas and details from
what you heard in class.
Attempt the homework problems by yourself with the text and section work at hand. The step above
will help this step go faster and be more fruitful.
At this point, seek help if you need it. Don't ask how to do the problem — ask how to get started, or
explain where you are stuck and ask for a nudge to get you past that point.
For a good measure of your understanding, keep track of the fraction of the homework you can do by
yourself or with minimal help. It's a better measure than your homework score, and only you can
measure it.
Show all work. Give reasoning. The question isn't always going to ask for it, because we assume
that you will provide justification for your answers. Calculations are fine as justifications, as are
diagrams that are clearly labeled to show what's going on.
Draw lots of diagrams. They are really helpful, as in this homework where a Venn diagram or two
might save you a headache or two