Te reo Māori terms
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Learning objective overview
Master Teaching Guide coverage for this objective.
Current NZC (2007)
S5-1
New NZC (2026)
NZC26-P4-STA-DKD-P-Y9-02NZC26-P4-STA-DKD-P-Y9-03NZC26-P4-STA-DKD-P-Y10-02NZC26-P3-STA-VIS-K-Y7-05NZC26-P3-STA-VIS-K-Y7-06NZC26-P3-STA-VIS-P-Y7-02NZC26-P3-STA-INT-P-Y7-04
Resources
- Beta: centre/spread Skills in Ex 30.01, pg 562
- CorbettMaths on mean, median, mode, and rangeQuestions PDF · Answers
- Dr Austin Maths - Averages and Range Revision Practice GridQuestions PDF · Answers
Terminology
- Mean (Average)
- Median (Middle)
- Mode (Most Common)
- Range
- Spread
Task goals
- Read the mode (tallest stack) and range (first-to-last occupied value) directly off a dot plot.
- Read the median off a dot plot, correctly handling both an odd count (single middle dot) and an even count (mean of the two middle dots).
- Calculate the mean of a data set shown on a dot plot.
- Work backwards from a target mean to find a missing data value.
- Judge whether the mean or the median better represents a "typical" value when a data set contains an outlier, and justify the choice.
- Explain why the range is far more sensitive to a single outlier than the median is, and recognise "average" as ambiguous shorthand for a specific measure of centre.
Where this fits
What leads into this objective, and where it goes next.
You are here
Measures of centre/spread
Do
Calculating the five-point-summary for numerical data: the minimum value; the value of quartile 1, or Q1; the value of the median or quartile 2, or Q2; the value of quartile 3, or Q3; the maximum value
Statement▸
Year 9 · Statistics · Developing knowledge from data
NZC26-P4-STA-DKD-P-Y9-02
Do
Calculating the interquartile range as IQR = Q3 − Q1
Statement▸
Year 9 · Statistics · Developing knowledge from data
NZC26-P4-STA-DKD-P-Y9-03
Also under S5-1:
For teachers
Need the fuller teaching notes for this objective? Open the Teacher guidance PDF.