Upcoming SlideShare
×

Chapter 2, Section 2

965 views

Published on

This is my presentation over our "Nature of Science and Technology" Book , Chapter 1, Section 2

0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Views
Total views
965
On SlideShare
0
From Embeds
0
Number of Embeds
198
Actions
Shares
0
5
0
Likes
0
Embeds 0
No embeds

No notes for slide

Chapter 2, Section 2

1. 1. CHAPTER 2, SECTiON 2<br />Mathematics and Science<br />
2. 2. ESTIMATION<br />An estimate is an approximation of a number based on reasonable assumptions.<br />This is NOT the same as guessing!! (Remember we DO NOT GUESS IN SCIENCE!!)<br />Scientists must rely on estimates when they cannot obtain exact numbers.<br />
3. 3. Accuracy and precision<br />Accuracy refers to how close a measurement is to the true or accepted value.<br />Precision refers to how close a group of measurements are to each other.<br />We need to try to be BOTH precise and accurate in science.<br />
4. 4. Averages<br />There are several way to determine an “average”<br />They include:<br />Mean<br />Median<br />Mode<br />
5. 5. MEAN<br />To find the mean or numerical average, add all the numbers and then divide by the total number of items in the list.<br />Example: <br />110+102+94+110+107+110+109=742<br />742/7 = 106<br />So, the average is 106<br />
6. 6. MEDIAN<br />The median is the middle number in a set of data.<br />Example:<br />Place the numbers in order from smallest to largest: 94, 102, 107, 109, 110, 110, 110<br />If your list has an odd number, then the median is the middle number <br />IF the list has an even number add the two middle numbers and divide by two to find the median<br />
7. 7. Mode<br />The mode is the number that appears most often in a list of numbers. Mode is most useful when a list contains many numbers that are the same<br />Example:<br />94, 102, 107, 108, 110, 110, 110<br />The mode is 110<br />