Class Homework and Announcements
Date	Homework	Announcements
August 25	Here is today's homework assignment.	Welcome to Math 135. I look forward to a great semester!
August 30	Here is today's homework assignment.	No new announcements.
September 1	Here is today's homework.	How to make Excel Histograms. Today's quiz will cover the in-class material and homework from 8/25 and 8/30. If you opt to turn in homework, turn in the homework that was assigned on these days. Remember, STAPLE your pages together.
September 6	Here is today's homework.	No new announcements.
September 8	Here is today's homework.	Today's quiz will cover the in-class material and homework from 9/1 and 9/6. If you opt to turn in homework, turn in the homework that was assigned on these days. Remember, STAPLE your pages together.
September 13	Read Section 2.2. Here is today's homework.	No new announcements.
September 15	Here is today's homework.	Today's quiz will cover the in-class material and homework from 9/8 and 9/13. If you opt to turn in homework, turn in the homework that was assigned on these days. Remember, STAPLE your pages together.
September 20	Problem 1: On the handout from class about "Ratings for Stats Classes" (on the back of the handout we used in class today) are five histograms. Make a boxplot for each class. Then write a couple sentences that compares the variability among classes. Problem 2: Make up a data set with 20 points that has exactly 2 lower outliers and 1 upper outlier. Make a boxplot for this data. Make sure that you demonstrate the 1.5IQR criterion. Problem 3: Using the method from class, approximate the standard deviation of the data set 4,4,4,6,6. Then approximate the standard deviation of the data set 6,6,6,4,4. Write a couple sentences that discuss your two approximations.	Your textbook talks about "mild" versus "extreme" outliers. You are only responsible for the 1.5IQR criterion that we discussed in class. Also, what I called "cutoffs", the book calls "fences".
September 22	Here is today's homework.	Today's quiz will cover the in-class material and homework from 9/15 and 9/20. If you opt to turn in homework, turn in the homework that was assigned on these days. Remember, STAPLE your pages together. Exam 1 has been postponed until Thursday, September 29. Next Tuesday's class will be held in Belk 358.
September 27	Today we will meet in Belk 358. Using Excel to find Descriptive Statistics. Using Excel to make Histograms. Using Excel to make Boxplots.	This is a Study Guide for Exam 1. Here is Quiz 5/6. It is due at the beginning of class on October 6. Go here to get the data for the quiz. The source for the data can be found here.
September 29	Today is Exam 1.	No new announcements.
October 4	Work on your take-home quiz (Quizzes 5 and 6). It is due at the beginning of class on Thursday.	No new announcements.
October 6	PROBLEM 1: In class we discussed the "Three Doors Problem" and derived the theoretical answers. Now you will play the game. Go to this website and play the game. To play, click on a door. Then another door will open. Then click on the door you want as your final decision (you may either stay or switch). Play this game 20 times using the "Stay" strategy and 20 times using the "Switch" strategy. Record the proportion of times that you won in each case. Do your experimental results support the theoretical results that we derived in class? Read Sections 3.2 and 3.3. On page 129, do 3.3,4,5,7,10,11a (Hint: Draw a Venn diagram with one circle for M and another for V), 12,13,14. WARNING: In order to learn how to do probability problems, you need to practice! Come to class next Tuesday having attempted all of these problems. Be prepared with questions.	No new announcements.
October 11	Here is Quiz 7/8. It is due at the beginning of class on October 25. Go here to get the data for the quiz. The source for the data can be found here.	No new announcements.
October 13	Fall break. Enjoy!	No new announcements.
October 18	Here is today's homework.	No new announcments.
October 20	Read Section 3.4. On page 145, do #18c, 19c, 20c, 24c, 27c. On page 150, do #49. Write down the defition of P(A|B). This involves P(A and B). Solve the equation for P(A and B). How does this equation simplify if A and B are independent?	Today's quiz will cover the in-class material and homework from 10/6 and 10/18. If you opt to turn in homework, turn in the homework that was assigned on these days. Remember, STAPLE your pages together.
October 25	On page 146, do #29, 30 Do these additional problems.	Take-home Quiz 7/8 is due at the beginning of class today. The exam that was originally scheduled for November 1 has been postponed until Nomber 17.
October 27	Read Sectoins 4.1 and 4.2. On page 154, do #3. On page 162, do #8,12(a,c),13,15 Problem 1: For each of the probability distribtutions in #9, determine the expected value of x. Also, make a histogram and guess the standard deviation of x. Problem 2: Consider the population of families with three children. Let the random variable x=the number of female children. Find the probability distribtution of x. What is the expected value of x? Problem 3: An urn contains 2 red marbles and a green marble. Draw two marbles, which replacement. Let x = the number of red marbles drawn. Determine the probability distribution of x. What is the expected value of x? Problem 4: Draw a square. Label the left hand corner "A". Then, moving clockwise, label the other corners "B", "C", and "D". Start at point A and flip a coin. If the coin lands heads, move one corner clockwise. If the coin lands tails, move one corner counterclockwise. Repeat this experiment until you return to corner A. Let x=number of times you flip the coin. Is x continuous or discrete? What are the possible values of x?	Today's quiz will cover the in-class material and homework from 10/20 and 10/25. If you opt to turn in homework, turn in the homework that was assigned on these days. Remember, STAPLE your pages together.
November 1	Here is today's homework. In addition to these problems, work on the "Random Lunchtime" handout from class. This homework is NOT due this Thursday. However, you should start it before Thursday's class and be ready to ask questions about it.	No new announcements.
November 3	Finish the homework that was assigned on November 1.	Today's quiz will cover the in-class material and homework from 10/27. If you opt to turn in homework, turn in the homework that was assigned on this day.
November 8	Read Section 4.3 in your textbook. On page 174, do #23(b,c,d,e,f,g, also, compute the expected value of x), 24, 25b(parts 1,2,3,4; HINT for part 1: Think "opposite".) Problem 1: An urn contains 2 red marbles and 1 green marble. Draw 6 marbles WITH replacement. Let X be the number of red marbles that you draw. (a) Explain why X is a binomial random variable. (This includes four things: 1. What is n, the number of trials? 2. What is a "success" and what is a "failure"? 3. What is the probability of success in each trial? 4. Are the trials independent? (b) Find the probability distribution of X. (c) Find the expected value of X. Problem 2: You are to take a multiple-choce exam consisting of 10 questions with five possible responses to each. Suppose that you have not studied and so must guess on each question. Let X represent the number of correct responses on the test. (a) Explain why X is a binomial random variable (There are four parts to this question, as stated above.) (b) What is the probability that you get at least 9 questions right? (c) What is the probability that you get less than 9 questions right? (d) What is the probability that you get no questions right?	The quiz and homework that were originally due last Thursday are due at the beginning of class today.
November 10	Since the exam is next Thursday, this homework is due next Tuesday, November 15. I want to encourage you to get it done so you can ask questions about it. Since there is no quiz this week, any bonus points that you get from this homework will be applied to last week's quiz. Finish the homework from 11/8. Here are a few more problems.	Today's quiz will cover the in-class material and homework from 11/1 and 11/8. If you opt to turn in homework, turn in the homework that was assigned on this day.
November 15	To be completed.	Here is a study guide for Exam 2.
November 17	Today is Exam 2.	Please bring your graphing calculator to EVERY class for the rest of the semester!
November 22	Read Section 5.3 in your text. The normal distribution table on the handout from class can also be found on page 814 of your text. For each of the following problems, MAKE SURE THAT YOU SKETCH A PICTURE OF THE REGION WHOSE PROBABILITY YOU ARE INTERERSTED IN. This is an important step in helping you solve the problem. On page 209, do #26,27,28(c and d),29,31,34,40. Also, for #40, find the first and third quartiles. This material will count for AT LEAST 33% of your next Exam! Study this material! Have a wonderful Thanksgiving!	Please bring your graphing calculator to EVERY class for the rest of the semester!
November 29	Here is today's homework.	Please bring your graphing calculator to EVERY class for the rest of the semester!
December 1	Here is today's homework. If you had a quiz this week, this is a longer version of what it would have been. Here are the answers to the quiz.	The exam that was scheduled for today has been postponed until Thursday, December 8.
December 6	READING DAY - NO CLASS.	No new announcements.
December 8	Exam 3 is today.	No new announcements.
Thursday, December 15	The Final Exam is today from 3:00-5:30.	No new announcements.