EASY
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The diagram first used by Florence Nightingale, which shows a circular distribution of data is 

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Important Questions on Interpreting and Comparing Data

MEDIUM
A _____ correlation is a relationship between two variables that tend to move in the same direction. 
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The type of correlation existing between the variables in the graph is

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MEDIUM

Eight dancers take part in a dance competition. Three judges give each dancer a mark. The scatter diagrams show the marks. Which two judges' marks show positive correlation?

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EASY

The type of correlation existing between the variables in the graph is

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MEDIUM

Students take tests in maths and science. Mishal makes this conjecture: "Student with higher marks in science also tend to have higher marks in maths test."

She collects data from some of her class and draws this scatter graph.

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MEDIUM
Correlation is said to be _____ if the ratio of change is constant
EASY
The height and weight of a group of persons will have _______ correlation.
MEDIUM

Eight dancers take part in a dance competition. Three judges give each dancer a mark. The scatter diagrams show the marks. Which two judges' marks show no correlation?

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EASY

The type of correlation existing between the variables in the graph is

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The type of correlation existing between the variables in the graph is

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EASY
If the two variables do not have linear relationship between them then they have a correlation coefficient equal to
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A _____ graph can show the positive or negative correlation (or no correlation at all).