Lesson Example Discussion Quiz: Class Homework |
Step-5 |
Title: Percentile |
Grade: 9-a Lesson: S2-L5 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
For the scores 3, 5, 7, 9, 12, 21, 25, 30.calculate the 25th percentile |
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2 |
Step |
Arrange the given scores in ascending order |
3, 5, 7, 9, 12, 21, 25, 30 |
3 |
Step |
Total number of observations |
n = 8 |
4 |
Step |
Given percentile value |
x = 25 |
5 |
Formula: |
Percentile Rank \$ P_x = (x(n+1)) /100\$ |
|
6 |
Step |
Substitute the n,x values in percentile Rank |
\$ P_x = (25(8+1)) /100\$ |
7 |
Step |
Simplification |
\$ P_x = (25(9)) /100\$ |
8 |
Step |
Simplification |
\$ P_x = (225) /100\$ |
9 |
Step |
After simplification |
\$ P_x = 2.25 ∼ 2 \$ |
10 |
Step |
Count the value from left to right in the given data set |
2 |
11 |
Hint |
From the given data (from ascending order) |
2nd number is 5 |
12 |
Step |
25th percentile of the given data |
C = 5 |
13 |
Answer |
C |
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Tutor: Questions
| Seq | Type | Question | Audio |
|---|---|---|---|
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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