What can you do with numbers?

Question 1

What are the different scales of measurement? (4)

Answer 1

Nominal, Ordinal, Interval and Ratio

Question 2

What is a nominal scale?

Answer 2

A distinguishment between individuals (football player numbers)

Question 3

What is an ordinal scale?

Answer 3

A scale that has an order (1-10)

Question 4

What is an interval scale?

Answer 4

A scale where each unit is the same distance apart (degrees Celsius)

Question 5

What is a ratio scale?

Answer 5

A scale that has a natural zero (kelvin, weight)

Question 6

What is the standard system of measurement?

Answer 6

SI Units

Question 7

What are the seven base units on which all other units are derived from?

Answer 7

Ampere, Kelvin, Second, Meter, Kilogram, Mol and Candela

Question 8

What is accuracy of results comprised of? (2)

Answer 8

Trueness (how close to the value we want) and precision (how close to each other).

Question 9

Why were SI units widely adopted?

Answer 9

Because it simplifies scientific communication when everyone uses standard definitions and units.

Question 10

Define reliability

Answer 10

Reliability is how close repeated measurements agree.