Measures of Spread (VCE SSCE General Mathematics): Flashcards

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Measures of Spread
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Measure of spread

Quantifies how spread out/variable data values are

Three main measures of spread

Range, interquartile range (IQR), standard deviation

Formula for range RR

R=extlargestvalue−extsmallestvalueR = ext{largest value} - ext{smallest value}

Main limitation of range

Heavily influenced by extreme values/outliers

What does IQR measure?

Spread of middle 50% of observations

Formula for IQR

extIQR=Q3−Q1 ext{IQR} = Q_3 - Q_1

What % of observations are below Q1Q_1?

25%

What % of observations are below Q3Q_3?

75%

What does standard deviation measure?

Spread of data around the mean

Why square deviations in std dev formula?

Regular deviations always sum to zero

Explore VCE SSCE General Mathematics Revision Notes by Topics

Classifying and Displaying Categorical Data

Interpreting and Describing Frequency Tables and Bar Charts

Displaying and Describing Numerical Data

Characteristics of Distributions, Dot Plots, and Stem Plots

Measures of Centre

Measures of Spread

Percentages of Data Lying Within Multiple Standard Deviations of the Mean

Boxplots

Comparing the Distribution of a Numerical Variable Across Groups

Types of Data

Displaying and Describing the Distributions of Categorical Variables

Displaying and Describing Numerical Data - Further Exploration

Dot Plots and Stem Plots

Using a Logarithmic (Base 10) Scale to Display Data

Measures of Centre and Spread

The Five-Number Summary and the Boxplot

Show more

Comparing the Distribution of a Numerical Variable Across Groups

Types of Data

Displaying and Describing the Distributions of Categorical Variables

Displaying and Describing Numerical Data - Further Exploration

Dot Plots and Stem Plots

Using a Logarithmic (Base 10) Scale to Display Data

Measures of Centre and Spread

The Five-Number Summary and the Boxplot

The Normal Distribution and the 68–95–99.7% Rule

Explore VCE SSCE General Mathematics Model Answers by Topics

Classifying and Displaying Categorical Data

Interpreting and Describing Frequency Tables and Bar Charts

Displaying and Describing Numerical Data

Characteristics of Distributions, Dot Plots, and Stem Plots

Measures of Centre

Measures of Spread

Percentages of Data Lying Within Multiple Standard Deviations of the Mean

Boxplots

Comparing the Distribution of a Numerical Variable Across Groups

Types of Data

Displaying and Describing the Distributions of Categorical Variables

Displaying and Describing Numerical Data - Further Exploration

Dot Plots and Stem Plots

Using a Logarithmic (Base 10) Scale to Display Data

Measures of Centre and Spread

The Five-Number Summary and the Boxplot

Show more

Comparing the Distribution of a Numerical Variable Across Groups

Types of Data

Displaying and Describing the Distributions of Categorical Variables

Displaying and Describing Numerical Data - Further Exploration

Dot Plots and Stem Plots

Using a Logarithmic (Base 10) Scale to Display Data

Measures of Centre and Spread

The Five-Number Summary and the Boxplot

The Normal Distribution and the 68–95–99.7% Rule

Explore VCE SSCE General Mathematics Quizzes by Topics

Classifying and Displaying Categorical Data

Interpreting and Describing Frequency Tables and Bar Charts

Displaying and Describing Numerical Data

Characteristics of Distributions, Dot Plots, and Stem Plots

Measures of Centre

Measures of Spread

Percentages of Data Lying Within Multiple Standard Deviations of the Mean

Boxplots

Comparing the Distribution of a Numerical Variable Across Groups

Types of Data

Displaying and Describing the Distributions of Categorical Variables

Displaying and Describing Numerical Data - Further Exploration

Dot Plots and Stem Plots

Using a Logarithmic (Base 10) Scale to Display Data

Measures of Centre and Spread

The Five-Number Summary and the Boxplot

Show more

Comparing the Distribution of a Numerical Variable Across Groups

Types of Data

Displaying and Describing the Distributions of Categorical Variables

Displaying and Describing Numerical Data - Further Exploration

Dot Plots and Stem Plots

Using a Logarithmic (Base 10) Scale to Display Data

Measures of Centre and Spread

The Five-Number Summary and the Boxplot

The Normal Distribution and the 68–95–99.7% Rule

Explore VCE SSCE General Mathematics Exam Questions by Topics

Classifying and Displaying Categorical Data

Interpreting and Describing Frequency Tables and Bar Charts

Displaying and Describing Numerical Data

Characteristics of Distributions, Dot Plots, and Stem Plots

Measures of Centre

Measures of Spread

Percentages of Data Lying Within Multiple Standard Deviations of the Mean

Boxplots

Comparing the Distribution of a Numerical Variable Across Groups

Types of Data

Displaying and Describing the Distributions of Categorical Variables

Displaying and Describing Numerical Data - Further Exploration

Dot Plots and Stem Plots

Using a Logarithmic (Base 10) Scale to Display Data

Measures of Centre and Spread

The Five-Number Summary and the Boxplot

Show more

Comparing the Distribution of a Numerical Variable Across Groups

Types of Data

Displaying and Describing the Distributions of Categorical Variables

Displaying and Describing Numerical Data - Further Exploration

Dot Plots and Stem Plots

Using a Logarithmic (Base 10) Scale to Display Data

Measures of Centre and Spread

The Five-Number Summary and the Boxplot

The Normal Distribution and the 68–95–99.7% Rule

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