Lesson Example Discussion Quiz: Class Homework |
Step-3 |
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 |
The scores for some candidates in a test are 40,45,49,53,61,65,71,79,85,91.Find the 50th percentile? |
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2 |
Step |
Arrange the given scores in ascending order |
40,45,49,53,61,65,71,79,85,91. |
3 |
Step |
Total number of observations |
n = 10 |
4 |
Step |
Given percentile value |
x = 50 |
5 |
Formula: |
Percentile Rank \$ P_x = (x(n+1)) /100\$ |
|
6 |
Step |
Substitute the n,x values in percentile Rank |
\$ P_x = (50(10+1)) /100\$ |
7 |
Step |
Simplification |
\$ P_x = (50(11)) /100\$ |
8 |
Step |
Simplification |
\$ P_x = (550) /100\$ |
9 |
Step |
After simplification |
\$ P_x = 5.5 ∼ 6 \$ |
10 |
Step |
Count the value from left to right in the given data set |
6 |
11 |
Hint |
From the given data (from ascending order) |
6th number is 65 |
12 |
Step |
50th percentile of the given data |
A = 65 |
13 |
Answer |
A |
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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 |
What did you learn from the clues? |
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3 |
Hint |
What did you learn from the Hints? |
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4 |
Step |
What did you learn from the Steps? |
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5 |
Step |
How can we improve the Steps? |
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