Mathematics /AQA Psychology - Research Methods - Mathematical Content

AQA Psychology - Research Methods - Mathematical Content

Mathematics18 CardsCreated 3 days ago

A percentage is a way of expressing a number as a fraction of 100. It means “per hundred” — so to calculate a percentage, you divide the value by 100.

What does percentage mean?

Divided by 100

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Key Terms

Term
Definition

What does percentage mean?

Divided by 100

How to convert a percentage to a decimal?

  • Remove %

- Move decimal two places to the left

What is a decimal place?

Number of digits to the right the decimal point

How can a ratio be expressed as?

-Part-to-part ratio
or
-Part-to-whole ratio

What should a ratio be?

The lowest common denominator

What are significant figures?

When many numbers come after a decimal point, they may be rounded off to 1,2,3 or 4 significant figure

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TermDefinition

What does percentage mean?

Divided by 100

How to convert a percentage to a decimal?

  • Remove %

- Move decimal two places to the left

What is a decimal place?

Number of digits to the right the decimal point

How can a ratio be expressed as?

-Part-to-part ratio
or
-Part-to-whole ratio

What should a ratio be?

The lowest common denominator

What are significant figures?

When many numbers come after a decimal point, they may be rounded off to 1,2,3 or 4 significant figure

What is the job of a zero in significant figures?

To act as a place holder

What is 0.0024563562 to 1 significant figure?

0.002

What is 0.0024563562 to 4 significant figures?

0.002456

What is 253493.35 to 2 significant figures?

250000

What is standard form?

A way of expressing very large or very small numbers

What is the standard form of 320000?

3.2 x 10^5

What is the standard form of 0.000032?

3.2 x 10^-5

What does = mean?

Equality

What does > mean?

Greater than

What does < mean?

Less than

What does&raquo_space; mean?

Much greater than

What does &laquo_space;mean?

Much less than