Chapter 1 measurements
This presentation is the property of its rightful owner.
Sponsored Links
1 / 14

Chapter 1 Measurements PowerPoint PPT Presentation


  • 42 Views
  • Uploaded on
  • Presentation posted in: General

Chapter 1 Measurements. Accuracy and Precision. Accuracy. How close a measurement is to the actual or true value good accuracy true value poor accuracy true value. Precision. How well several measurements agree with each other good precision poor precision. Accuracy and Precision.

Download Presentation

Chapter 1 Measurements

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Chapter 1 measurements

Chapter 1Measurements

Accuracy and Precision

Timberlake LecturePLUS


Accuracy

Accuracy

How close a measurement is to the actual or true value

good accuracy

true value

poor accuracy

true value

Timberlake LecturePLUS


Precision

Precision

How well several measurements agree with each other

good precision

poor precision

Timberlake LecturePLUS


Accuracy and precision

Accuracy and Precision

What can you say about the accuracy and precision in each of the following:

Good precision, poor accuracy

Good precision, good accuracy

Timberlake LecturePLUS


Chapter 1 measurements

In your new job, you are to make the pizzas the size shown above. Your first four pizzas are shown below.

What can you say about the accuracy and precision of your pizzas?

Timberlake LecturePLUS


The next four pizzas

The next four pizzas.

What can you say about the accuracy and precision of the next four pizzas?

Timberlake LecturePLUS


Accuracy is improving

Accuracy is improving.

The two pizzas in the center show good accuracy. However, the precision is poor.

Timberlake LecturePLUS


Pizza precision

Pizza Precision

You have very good precision, but poor accuracy. I think the customers will want the pizzas made larger.

Timberlake LecturePLUS


Learning check ap1

Learning Check AP1

Match the following terms

1) Accuracy2) Precision

___ How close a measurement is to the

true value.

___ How close several measurements

are to each other.

Can you have data that are precise, but not accurate? Why or why not?

Timberlake LecturePLUS


Solution ap1

Solution AP1

Match the following terms

1) Accuracy2) Precision

_1_ Is how close a measurement is to the

true value.

_2_ Is how close several measurements

are to each other.

Yes. Data can be precise, but not come close to the true value.

Timberlake LecturePLUS


Learning check ap2

Learning Check AP2

How will each of the following affect accuracy and precision?

1. A meter stick that is missing the first centimeter.

2. A scale that has a zero point that is really five pounds above zero.

Timberlake LecturePLUS


Solution ap2

Solution AP2

How will each of the following affect accuracy and precision?

1. The shortened meter stick will produce measurements that have poor accuracy, but good precision is possible.

2. The poorly calibrated scale will give a weight that is not accurate, but good precision is possible.

Timberlake LecturePLUS


Learning check ap3

Learning Check AP3

True(1) or false (2). Measurements can have

poor accuracy and poor precision

good accuracy and poor precision

poor accuracy and good precision

good accuracy and good precision

Timberlake LecturePLUS


Learning check ap31

Learning Check AP3

True(1) or false (2). Measurements can have

poor accuracy and poor precision

good accuracy and poor precision

poor accuracy and good precision

good accuracy and good precision

1

2

1

1

Timberlake LecturePLUS


  • Login