Starter quiz
- Work out: = ______
- '415' ✓
- Starting with the highest number, put the numbers in descending order.
- 1⇔860
- 2⇔842
- 3⇔835
- 4⇔831
- 5⇔830
- 6⇔819
- ______ is exactly half way between 64 and 86.
- '75' ✓
- The mean of 34 and 56 is ______.
- '45' ✓
- Starting with the lowest number, put the numbers in ascending order.
- 1⇔4.092
- 2⇔4.2
- 3⇔4.87
- 4⇔5
- 5⇔5.16
- 6⇔5.167
- A measure of ______ tendency is a summary measure that attempts to describe a whole set of data with a single value that represents the middle or centre of its distribution.
- 'central' ✓
Exit quiz
- The median is the ______ piece of data when the data are in numerical order. It is a measure of central tendency representing the average of the values.
- 'central' ✓
- Match the number of data points with the position of the median.
- 65 values⇔33rd position ✓
- 66 values⇔33.5th position ✓
- 61 values⇔31st position ✓
- 68 values⇔34.5th position ✓
- The median from this list: 2.4, 2.5, 2.6, 2.6, 2.7, 2.8, 2.8, 2.9 is ______.
- '2.65' ✓
- Which of these data sets can you find the median for?
- 3, 7, 2, 8, 1, 9, 3, 5 ✓
- cat, dog, rabbit, dog, dog, cat, cat, hamster, fish
- -2, -5, -2, -7, -3, -6, -7.2 ✓
- red, orange, yellow, blue, green, yellow, white, black, purple
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Sam wants to calculate the median of this data set. Is Sam's working correct?- Yes - the middle number has been identified
- No - the data has not been ordered first ✓
-
Data is presented in a dot plot. The median value is ______.- '4' ✓
Worksheet
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Presentation
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Lesson Details
Key learning points
- The median is a measure of central tendency.
- The median is the middle (or average middle) value in an ordered data set.
- The median can be seen as the halfway point of a set of values.
Common misconception
Pupils may confuse the position of the median with the median's actual value.
Choose data where the position number would not be a reasonable median value and ensure pupils sense check their answers every time.
Keywords
Median - the central (middle) piece of data when the data is in numerical order. A measure of central tendency representing the average of the values
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