Accuracy and Precision

Describe the accuracy and precision of the image

• Accurate and Precise
• Accurate and not precise
• Not Accurate and Precise
• not accurate and not precise

A set of data are all close to each other, and they are close to the actual value.  This set of data can be described as...

• accurate
• precise
• both precise and accurate

Which Student is the most Precise?

• Alex

• Shandra

• Luis

Tags

CCSS.6.RP.A.3D

How close a measurement is to the accepted value is called..

• Accuracy

• Precision

• Significant

• Estimate

It is a measure of how close measurements come to each other when they are made in the same way

• Accuracy
• Precision
• Error
• Extrapolation

Zed went to the store and bought a bag of chips.  He estimated there would be 350 chips in the package, but realized there were only 210 chips in that package.  What was his percent error?

• 35%
• 67%
• 85%
• 92%

Tags

CCSS.6.RP.A.3C

The deer population is estimated to be 17,600 in northern Illinois, but an actual count was 21,300. What is the percent error?

• 83%

• 11%

• 17%

• 21%

The students measured length during a science experiment, they got 12.00 cm. But the actual measurement was 14.25 cm. What was the percent error?

• 15.79%

• 18.75%

• 2.25%

• 18.00%

A group measured the mass of a metallic sample 4 times. The measurements recorded were: 12.57g, 12.99g, 15.35g and 12.00g. Calculate the precision of the group.

• 52.91 +/- 1.68 g

• 52.91 +/- 3.35 g

• 13.23 +/- 1.675 g

• 13.23 +/- 1.68 g