Analysing Data (Leaving Cert Mathematics): Quizzes

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Measure of Spread
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What does the measure of spread describe?

Variability in a data set

How is the range calculated?

Maximum - Minimum

Which measure of spread is most sensitive to outliers?

Range

What percentage of data does the IQR represent?

50%

What is the formula for IQR?

Q3−Q1Q3 - Q1

What does Q1Q1 represent?

Lower quartile (25th percentile)

Which symbol denotes population standard deviation?

σ\sigma

What does standard deviation measure?

Average distance from the mean

Using IQR method, when is a value an outlier?

<Q1−1.5×IQR< Q1 - 1.5 \times IQR

Using Z-scores, when is a point a potential outlier?

∣z∣>3|z| > 3

Explore Leaving Cert Mathematics Revision Notes by Topics

The Basics

Graphing Data

Scatter Plots & Correlation

Analysing Data

Measures of Relative Standing

Frequency Distributions

Explore Leaving Cert Mathematics Model Answers by Topics

The Basics

Graphing Data

Scatter Plots & Correlation

Analysing Data

Measures of Relative Standing

Frequency Distributions

Explore Leaving Cert Mathematics Flashcards by Topics

The Basics

Graphing Data

Scatter Plots & Correlation

Analysing Data

Measures of Relative Standing

Frequency Distributions

Explore Leaving Cert Mathematics Exam Questions by Topics

The Basics

Graphing Data

Scatter Plots & Correlation

Analysing Data

Measures of Relative Standing

Frequency Distributions

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