All the solutions provided in McGraw Hill My Math Grade 2 Answer Key PDF Chapter 9 Data Analysis will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 2 Answer Key Chapter 9 Data Analysis
Essential Question
How can I record and analyze data?
Answer: Firstly, Set the given data in an order and then arrange them in an informative order for analyzing the data. This can be helpful in all types of problems.
Explanation:
A data set is a collection of numbers or values that relate to a particular subject.
Data analysis is the practice of working with data to get useful information.
Am I Ready?
Circle the group that has more.
Question 1.
Answer: The first group has 7 cats and the second group has 5 cats
So, the first group has more cats than second group.
Explanation:
Use the tally chart to answer the questions.
Question 2.
What pet has 4 tally marks?
Answer: Hamster has 4 tally marks
Explanation:
Given, cat has 3 tally marks and a dog has 2 tally marks
Then, Hamster has 4 tally marks
Question 3.
How many people like cats?
___________ people
Answer: 3 people like cats as their favorite pets
Explanation:
As shown in the table above, only cat column has 3 tally marks
so, 3 people like cats as their favorite pets
Use the picture to solve.
Question 4.
Roy walks four dogs every day. How many brown dogs does he walk?
___________ brown dogs
Answer: He walks 2 brown dogs
Explanation:
As shown in the figure , Roy walks four dogs every day
Two of them are white and other two are brown.
So, He walks 2 brown dogs
My Math Words
Review Vocabulary
compare
graph
tally marks
Use the review words to describe each example.
What is a graph?
Answer: A graph is a structure amounting to a set of objects in which some pairs of the objects are in some sense “related”.
Explanation:
In this example, There are 5 tally marks
There are more red balloons than yellow balloon
The graph will be, 
My Vocabulary Cards
Teacher Directions: Ideas for Use
- Have students group 2 or 3 common words. Ask them to add a word that is unrelated to the group. Have them work with a friend to name the unrelated word.
- Have students write a tally mark on each card every time they read the word in this chapter or use it in their writing.
Answer: The detailed explanation is given below
Explanation:
Numbers or symbols that show information is Data
A graph that uses bars to show data is Bar graph
A graph used to show how often a certain number occurs in data is Line plot
Tells what or how many each symbol stands for is Key
To collect data by asking the people same question is Survey
A graph that has different pictures to show information collected is Picture graph
Teacher Directions: More Ideas for Use
- Ask students to group like ideas they find throughout the chapter, such as using different ways to display data. Have students share the strategies they use to understand the concepts.
- Have students use a blank card to write this chapter’s essential question. Have them use the bock of the card to write or draw examples that help them answer the question.
Answer: The detailed explanation is given below
Explanation:
Marks used in a survey to collect data is Tally marks.
A letter or figure that stands for something is Symbol.
My Foldable
Follow the steps on the back to make your Foldable.
