Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Percentile Range |
Grade: 9-a Lesson: S2-L6 |
Explanation: The best way to understand statistics is by looking at some examples. Take turns and read each example for easy understanding. |
Examples:
The weights of 8 people were recorded in kg as 35, 41, 42, 56, 58, 62, 90, 77. Find the percentile for the weight 58 kg.
Step 1a
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Arranging in ascending order |
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Explanation: Let us arrange the observations in ascending order i.e, smallest value to largest value \$35, 41, 42, 56, 58, 62, 77, 90\$ |
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Step 1b
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Identify the n and N values. |
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Explanation: Total number of values 'N' = 8, Number of values below '58' = 4 |
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Step 1c
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Calculate Percentile |
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Explanation: Percentile = \$"Number of values below x" / "Total number of values " \$ × 100 Percentile = \$4/8\$ × 100 ⇒ \$0.5 × 100\$ Percentile = 50 The percentile for weight 58kg = 50 |
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