Exploring and Describing Data (HSC SSCE Mathematics Standard): Quizzes

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Outliers
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10 questions from this quiz

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What is an outlier?

A value unusually far from most others

What multiplier is used with IQR to identify outliers?

1.5

What is the formula for the lower outlier limit?

Q11.5×IQRQ_1 - 1.5 \times \text{IQR}

What is the formula for the upper outlier limit?

Q3+1.5×IQRQ_3 + 1.5 \times \text{IQR}

When is a value classified as an outlier?

Below lower limit OR above upper limit

In small datasets, which measure is most affected by outliers?

Mean

How do outliers affect the mode in small datasets?

Usually no effect

Which measure should you use when outliers are present?

Median

How do outliers affect large datasets?

Minimal effect on mean, median, mode

If Q3=48Q_3 = 48 and IQR=28\text{IQR} = 28, what is the upper outlier limit?

90

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