Lesson Example Discussion Quiz: Class Homework |
Step-4 |
Title: Median for grouped data |
Grade: 9-a Lesson: S1-L5 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
From the given observations.Find the median |
|
2 |
Step |
From the above table |
\$n=66\$ |
3 |
Step |
Finding median class |
\$n/2 = 66/2 = 33\$ |
4 |
Step |
Median class |
10-15 |
5 |
Step |
Lower class limit l |
\$l = 10\$ |
6 |
Step |
Cumulative frequency of the preceding class of the median class cf |
\$cf = 25\$ |
7 |
Step |
Frequency of the median class f |
\$f = 12\$ |
8 |
Step |
class size h |
\$h = 15-10 = 5\$ |
9 |
Formula: |
Median = \$l + (n/2 -cf)/f × h\$ |
|
10 |
Step |
substitute all the above values and solve |
Median = \$10 + (66/2 - 25)/12 × 5\$ |
11 |
Step |
Simplification |
\$10 + (33-25)/12 × 5\$ |
12 |
Step |
Simplification |
\$10 + 8/12 × 5\$ |
13 |
Step |
Simplification |
\$10 + 0.66 × 5\$ |
14 |
Step |
After simplification |
\$10 + 3.33\$ |
15 |
Step |
After addition |
\$13.33\$ |
16 |
Answer |
C = 13.33 |
|
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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