Lesson Example Discussion Quiz: Class Homework |
Step-2 |
Title: Measures of variation-Interquartile range |
Grade: 9-a Lesson: S1-L8 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
| Step | Type | Explanation | Answer |
|---|---|---|---|
1 |
Problem |
What is the range from the ages of women? 65,25,55,40,90,20,85,15,70,5,75 |
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2 |
Step |
Arrange the numbers in ascending order |
5,15,20,25,40,55,65,70,75,85,90 |
3 |
Step |
Divide the data to identify quartiles |
5,15,20,25,40,\$55\$ → first half |
4 |
Step |
Identify the \$Q_1\$ from first half |
\$Q_1\$=\$(20+25)/2\$=\$45/2\$=22.5 |
5 |
Step |
Identify the \$Q_3\$ from second half |
\$Q_3\$=\$(70+75)/2\$=\$145/2\$=74.5 |
6 |
Formula: |
IQR = \$Q_3 -Q_1\$ |
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7 |
Step |
Substitute the above values and solve |
74.5 - 22.5 = 52 |
8 |
Answer |
A = 52 |
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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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