Investigation 2Types of Data

Michelle BallentineKendria Sutherlin

Verra Williams

Quote

It is a mathematical fact that 50% of all doctors graduate in the bottom of their

class.~Unknown

POD

How many times can you subtract 7 from

83? What is left afterwards?

You can subtract it as many times as you want, and it

leaves 76 every time.

83-7 =76

83-7 =76

83-7 =76

83-7 =76

83-7 =76

83-7 =76

OBJECTIVE

• To note the kind of data being collected; that is categorical or numerical

• To use bar graphs to display categorical and numerical data

• To understand how measures of center (median, mode) and spread (range) relate to numerical and categorical data

Problem 2.1

• From the graphs definitions you formed by doing IMOW, complete the following:

A. Write two questions that have categorical data as answers.

B. Write two questions that have numerical data as answers.

Journal Writing

• Problem 2.1 Follow-UP– Is it possible to find the mode of a set of

categorical data? Explain your answer.

• THINK PAIR SHARE

Categorical

Numerical

HOMEWORK

ACE problems 1-8 page 26

What type of graph is it?

What type of graph is it?

What type of graph is it?

Classroom Activity

• Using animal crackers create the following:1.Bar graph or line plot2.Circle graph with the following: fraction, decimal &

percent

Make sure you graph has the following elements:Title, legend, labeled y-axis and x-axis

Materials: Poster board, glue, animal crackers

Problem 2.2

• Decide whether each question below can be answered by using data from the graphs the students created. If a question can be answered, explain why not and tell what additional information you would need to answer the question.

A. Which graph show categorical data, and which graph shows numerical data?

B. What is the total number of pets the students have?

C. What is the greatest number of pets that any student in the class has?

D. How many students are in the class?E. How many students chose cats as

their favorite kind of pet?

F. How many cats do students have as pets?G. What is the mode for the favorite kind of

pet?H. What is the median number of pets

students have?I. What is the range of the numbers of pets

students have?J. Tomas is a student in this class. How

many pets does he have?K. Do the girls have more pets than the

boys?

Journal Writing

• Follow-Up 2.2– Do you think the students surveyed live

in a city, the suburbs, or the country? Explain your answer.

HOMEWORK

ACE Problems #’s: 9-14 pages 26-28

JOURNAL REFLECTIONS

Page 29 Problems 1-3

WORD WALL

• Mode• Range• Average (mean)• Measures of center• Median• Bar graph• Line plot• Categorical• numerical

ACOS

• Standard 1• Standard 2• Standard 10