Statistical Measures (AQA A-Level Mathematics): Quizzes

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Basic Statistical Measures
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What does the Greek letter capital Sigma (∑\sum) mean in statistics?

Sum of

If x=(3,5,8)x = (3, 5, 8), what is ∑x\sum x?

1616

Which characteristic describes the mean?

Uses all data

What is the formula for the mean?

xˉ=∑xn\bar{x} = \frac{\sum x}{n}

What formula gives the position of the median in a list?

n+12\frac{n+1}{2}

For the list (2,5,8,11)(2, 5, 8, 11), what is the median?

6.56.5

Which measure uses only a single data point?

Median

When is the median better than the mean?

When data has extreme outliers

What is the Lower Quartile (LQ)?

Median of the lower list

What is the formula for the Interquartile Range (IQR)?

IQR=UQ−LQ\text{IQR} = UQ - LQ

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Statistical Measures

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Working with Data

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Further Correlation & Regression (A Level only)

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Statistical Measures

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Working with Data

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Further Correlation & Regression (A Level only)

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Statistical Measures

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Working with Data

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Further Correlation & Regression (A Level only)

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Statistical Measures

Data Presentation

Working with Data

Correlation & Regression

Further Correlation & Regression (A Level only)

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