Lesson Example Discussion Quiz: Class Homework |
Step-1 |
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 math test scores were: 50,65,70,72,72,78,80,82,84,84,85,86,88,88,90,94,96,98,98,99 |
Find the percentile rank for a score of 84 on this test. |
2 |
Formula: |
Percentile = \$"Number of values below x" / "Total number of values " \$ × 100 |
|
3 |
Step |
Arrange the data in ascending order |
50,65,70,72,72,78,80,82,84 |
4 |
Step |
Total number of values 'N' = 20 Number of values below '84' = 8 |
|
5 |
Step |
Percentile |
\$8/20\$ × 100 |
6 |
Step |
Simplification |
\$2/5\$ × 100 |
7 |
Step |
After simplification |
\$0.4 × 100 \$ ⇒ 40 |
8 |
Step |
P = 40 |
84 marks point at 40th percentile. |
9 |
Answer |
D |
Tutor: Questions
| Seq | Type | Question | Audio |
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1 |
Problem |
What did you learn from this problem? |
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2 |
Clue |
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3 |
Hint |
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4 |
Step |
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5 |
Step |
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