HW: Data, Accuracy, & Precision

Refers to how close a measurement is to the correct value​ (a)  

Refers to the repeatability of data​ (b)  

• Accuracy
• Precision
• Clarity
• Randomness
• Variability

1. Olivia collects data in an experiment where she tries to determine the density of a certain material in her science class.

Trial #1 1.20 g/mL

Trial #2 1.22 g/mL

Trial #3 1.22 g/mL

1. The density of the material is known to be 1.24 g/mL.

What can you say about the accuracy of her results?

• High accuracy

• Low accuracy

Tags

NGSS.MS-PS1-2

1. Olivia collects data in an experiment where she tries to determine the density of a certain material in her science class.

Trial #1 1.20 g/mL

Trial #2 1.22 g/mL

Trial #3 1.22 g/mL

1. The density of the material is known to be 1.24 g/mL.

What can you say about the precision of her results?

• High precision

• Low precision

Tags

NGSS.MS-PS1-2

1. Olivia collects data in an experiment where she tries to determine the density of a certain material in her science class.

Trial #1 1.20 g/mL

Trial #2 1.22 g/mL

Trial #3 1.22 g/mL

1. The density of the material is known to be 1.24 g/mL.

What kind of data is she collecting?

• Qualitative data

• Quantitative Data

1. Jason collects data in an experiment where he tries to determine the density of a certain material in his science class.

Trial #1 0.95 g/mL

Trial #2 1.16 g/mL

Trial #3 1.26 g/mL

1. The density of the material is known to be 1.15 g/mL.

What can you say about the accuracy of his results?

• High accuracy

• Low accuracy

Tags

NGSS.MS-PS1-2

1. Jason collects data in an experiment where he tries to determine the density of a certain material in his science class.

Trial #1 0.95 g/mL

Trial #2 1.16 g/mL

Trial #3 1.26 g/mL

1. The density of the material is known to be 1.15 g/mL.

What can you say about the precision of his results?

• High precision

• Low precision

Tags

NGSS.MS-PS1-2

Classify the following type of data:

You record that a reaction gives off a strong odor.

• qualitative data

• quantitative data

Tags

NGSS.MS-PS1-2

Classify the following type of data:

You record that a sample has an initial mass of 20.4 grams.

• qualitative data

• quantitative data

Classify the following type of data:

You record that you measured 80.25 mL

of water using a graduated cylinder.

• qualitative data

• quantitative data

Classify the following type of data:

You mix two solutions and record that

a yellow precipitate (solid) forms.

• qualitative data

• quantitative data

Tags

NGSS.MS-PS1-2