The Principal Raw Materials for Making Iron Are Coal,iron Ore

question 25

Multiple Choice

The principal raw materials for making iron are coal,iron ore and

• A)chromium.
• B)limestone.
• C)clay.
• D)oil.

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Definitions:

Correlation Coefficient

A statistical measure that calculates the strength of the relationship between two variables.

Independent Variable

A variable in scientific research that is manipulated or changed to observe its effect on a dependent variable.

Continuous

Refers to data or a variable that can take on any value within a given range, not restricted to discrete values.

Scatterplot

A type of graph used in statistics to display values for two variables for a set of data, revealing any correlational patterns.