Average & median
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This document provides instructions for calculating average and median. It defines average as the central value of data found by adding all values, dividing by the number of values. Median is defined as the middle value when values are arranged from lowest to highest. The steps to find median are to arrange the values and select the middle value or average of the two middle values. Examples are provided to demonstrate calculating average by adding and dividing, and finding median by arranging values.
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- 1. LESSON 2: AVERAGE & MEDIAN Level 5, Unit 4 (Data) Author: Department of Science & Mathematics Helper: العلوم و الرياضيات قسم
- 2. LESSON OBJECTIVES: I. To know what average is II. To know the steps to find average III. To know what median is IV. To know the steps to find median V. To solve some problems
- 3. What is average? Average (Mostly known as mean) is the number expressing the central value of data.
- 4. How do I find the average of (9-8-1) Step 1: Add the values (Variable 1) Step 2: Add the number of values (Variable 2) Step 3(Final): Divide “Variable 1” by “Variable 2” (Variable 3), So “Variable 3” is the average Variables: Variable 1: 18 Variable 2: 3 Variable 3: 6
- 5. What is median? Median is the middle value of arranged values.
- 6. How do I find the median of (4-3-3) Step 1: Arrange the values Step 2: Cross the numbers from left to right, the number left is the median.
- 7. But in (1-4-3-5) there are 2 numbers left. If this happens find the average of the 2 numbers, the average of them is the median.
- 8. OPEN YOUR PRINTED WORKBOOK P24- 25
- 9. THE END Teacher: Miss Hanan Muhammed