Measurement Review

What is the relationship between the minor divisions of a scale and the uncertainty?

• Nothing

• They are the same

• The uncertainty depends on what is being measured

• The uncertainty is +/- the minor division

What are the minor divisions worth?

• 1

• 0.1

• 0.2

• 0.01

What number is certain in the following measurement?

4.2g

• 4

• 2

• both

• neither

What is the uncertainty of the scale above?

• 1

• +/-0.1

• +/- 0.05

• 0.05

What numbers are certain in the following measurement:

4.56

• 4 and 6

• 5 and 6

• 4 and 5

• all of them

What numbers are an estimate in the following measurement:

56.4

• 4

• 6

• 5

• all of them

What numbers are an estimate in the following measurement:

8.765

• 5

• 6

• 7

• 8

If the actual value is 1.9g, how would you describe the following set of data is:

[1.2, 2.3, 1.5, 1.9}

• accurate

• Precise

• both

• neither

If the actual value is 4g, how would you describe the following set of data is:

[0.9, 1.1, 1.1, 1.0]

• accurate

• Precise

• both

• neither

If the actual value is 5g, how would you describe the following set of data is:

[1.9, 2.3, 3.1, 7.2]

• accurate

• Precise

• both

• neither