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Lesson Example Discussion Quiz: Class Homework

Step-3

Title: Measures of variation-Interquartile range

Grade: 9-a Lesson: S2-L1

Explanation: Hello Students, time to practice and review the steps for the problem.

Step	Type	Explanation	Answer
1	Problem	What is the interquartile range of these integers? 12,-10,11,4,,2,-8,-4,15,-11,25
2	Step	Arrange the numbers in ascending order	-11,-10,-8,-4,2,4,11,12,15,25
3	Step	Divide the data to identify quartiles	-11,-10,-8,-4,2 → first half , 4,11,12,15,25 → second half
4	Step	Identify the \$Q_1\$ from first hal*	\$Q_1\$ = -8
5	Step	Identify the \$Q_3\$ from second half	\$Q_3\$ = 12
6	Formula:	IQR	\$Q_3 -Q_1\$
7	Step	Substitute the above values and solve	12 - (-8) = 12+8 = 20
8		Answer	C

Step

Type

Explanation

Answer

Problem

What is the interquartile range of these integers?
12,-10,11,4,,2,-8,-4,15,-11,25

Step

Arrange the numbers in ascending order

-11,-10,-8,-4,2,4,11,12,15,25

Step

Divide the data to identify quartiles

-11,-10,-8,-4,2 → first half , 4,11,12,15,25 → second half

Step

Identify the \$Q_1\$ from first hal*

\$Q_1\$ = -8

Step

Identify the \$Q_3\$ from second half

\$Q_3\$ = 12

Formula:

IQR

\$Q_3 -Q_1\$

Step

Substitute the above values and solve

12 - (-8) = 12+8 = 20

Answer

Tutor: Questions

Seq	Type	Question
1	Problem	What did you learn from this problem?
2	Clue	What did you learn from the clues?
3	Hint	What did you learn from the Hints?
4	Step	What did you learn from the Steps?
5	Step	How can we improve the Steps?

Seq

Type

Question

Audio

Problem

What did you learn from this problem?

Clue

What did you learn from the clues?

Hint

What did you learn from the Hints?

Step

What did you learn from the Steps?

Step

How can we improve the Steps?