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Lesson Example Discussion Quiz: Class Homework

Step-2

Title: Percentile Range

Grade: 9-a Lesson: S2-L6

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

Step	Type	Explanation	Answer
1	Problem	The scores for student are 40,41,42,43,45,47,49,50,51,51,54,57,59,60,61,63,67,69,70,71	Find out the percentile for score 54
2	Formula:	Percentile = \$"Number of values below x" / "Total number of values " \$ × 100
3	Step	Arrange the data in ascending order	40,41,42,43,45,47,49,50,51,51 54,57,59,60,61,63,67,69,70,71
4	Step	Total number of values 'N' = 20, Number of values below '54' = 10
5	Step	Percentile	\$10/20\$ × 100
6	Step	Simplification	\$1/10\$ × 100
7	Step	After simplification	\$0.1 × 100 \$ ⇒ 10
8	Step	P = 10	54 marks point at 10th percentile.
9		Answer	B

Step

Type

Explanation

Answer

Problem

The scores for student are 40,41,42,43,45,47,49,50,51,51,54,57,59,60,61,63,67,69,70,71

Find out the percentile for score 54

Formula:

Percentile = \$"Number of values below x" / "Total number of values " \$ × 100

Step

Arrange the data in ascending order

40,41,42,43,45,47,49,50,51,51
54,57,59,60,61,63,67,69,70,71

Step

Total number of values 'N' = 20,

Number of values below '54' = 10

Step

Percentile

\$10/20\$ × 100

Step

Simplification

\$1/10\$ × 100

Step

After simplification

\$0.1 × 100 \$ ⇒ 10

Step

P = 10

54 marks point at 10th percentile.

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?

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