1. Find the mode for the following sets of data.
Bell Ringer
Find the mode for the following sets of data.
, 15, 17, 19, 21
2. 3, 4, 5, 3, 3, 2, 1, 2
, 92, 91, 90, 88, 87, 88
, 100, 200, 202, 100, 30

2. Announcements Math Placement Test on May 8
Last day to turn in work is May 8

3. May Calendar
Only 16 school days left and 2 of them are half days 

4. Where to find today’s lesson…
R drive > Key > April 27_May 1 > 4_29__Chapter 13 Activity

5. Math Activity (Always round to the nearest tenth)
You may work with a partner, but everyone MUST submit their own paper.
Part 1
Step 1: Copy the list of grades from the board onto your paper. Make sure you have 25 numbers.
Step 2: Order the numbers from least to greatest. Check and make sure you have 25 numbers.
Step 3: Answer the following questions: (There are a LOT of numbers so double check your answers)
(1) What is the mean?
(2) What is the median?
(3) What is the mode?
(4) Which of the above is the most accurate representation of the center of the data? Why?

6. Math Activity - Continued (Always round to the nearest tenth)
Part 2
Step 1: Find the following values.
5. Median (Q2) Lower Quartile (Q1) Upper Quartile (Q3) Interquartile Range (IQR)
9. Outliers
Step 2: Make a Box – and – Whisker Plot displaying your data.

7. Math Activity - Continued (Always round to the nearest tenth)
Part 3
Step 1: Make a Histogram that contains all the data from the class. You should count by 2’s on the vertical axis. Your intervals on the x axis should be:
1 – 10, 11 – 20, 21 – 30, 31 – 40, 41 – 50, 51 – 60, 61 – 70, 71 – 80, 81 – 90,
Step 2: Answer the following questions:
10. How many students scored 61 and above?
11. How many students scored 50 and below?
12. What percent of students scored in the range of 91 – 100?
13. What percent of students scored in the range of 61 – 70?
14. In what range did most students in the class score?

8. What’s Coming Up Next?
Tomorrow, we will begin learning how to solve systems of equations – and that means we will be graphing again.
What you don’t get finished in class, will need to be finished for homework.
With the same partner, I want you to grab a book from the front of the room and complete the following review problems. Since this is homework, you will each need your own piece of paper. If you get stuck, look at the front of that section for some examples that have been worked correctly.
Section 8.6 (pg 435) # 2 – 5, 10 – 13
Section 8.7 (pg 441) #1, 2, 5 – 7,

9. Section 8.6 #2-5, 10 – 13 {On #3, the points are (2, -1) and (6, 1)}

10. Section 8.6 #2-5,

11. Section 8.7 #1, 2, 5-7,