Maths And Stats Tests

Question 1

Standard deviation

Answer 1

When adding/minusing standard devisation from means and there’s no overlap there’s likely to be a significant difference.
If there is an overlap there’s not likely to be a significant difference.

Question 2

Conversion of cm to micrometres

Answer 2

x100,000,000

Question 3

Percentage decrease

Answer 3

Start number - end number
Difference divided by start number
x100