Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting...

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Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time using different scales for the DV

Transcript of Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting...

Page 1: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Happy Tuesday Scientists!

Today:Return scored work

Grades

Data and Graphs Study GuideCollecting Discrete Data Activity

HW: Graph your data a second time using different scales for the DV

Page 2: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Graphing Study Guide

Are you ready to go?

Page 3: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

• There are 4 major types of graphs we’ll use this year.

I can remember

that

Page 4: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Types of Data

1. Discrete data = consist of categories (days of the week, kind of animal, color)

2. Continuous data = consist of measurements involving a scale with equal measurements; a range of values (temperature, length of time in hours, height in centimeters)

Page 5: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Four major types of graphing

1. Pie chart/graph = consist of categories (display percentages)

2. Bar graph = used to represent discrete data; the IV is typically qualitative and DV is typically quantitative

Page 6: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Four major types of graphing

3. Line graph = used to represent continuous data, usually tracking changes over time; the IV and DV are both quantitative and the line connecting the points has meaning

4. Scatter plot = similar to a line graph, but the data points are NOT connected because a connecting line would have no meaning; a line of best fit might be constructed to show a trend in the data; IV and DV are typically both quantitative

Page 7: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Scatter plot

0 1 2 3 4 5 6 70

5

10

15

20

25Helicopter Drop Time Influenced by Pa-

perclips

# of Paperclips

Dro

p Ti

me

(s)

This is a line of best fit – it is a straight line that comes as close to possible as all the data points

The data points should NOT be directly connected because the IV is discrete

Page 8: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Bar Graph6th period student drink choices

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pepsi coke rootbeer

dr.pepper

Drink Option

# o

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Series1

This is what we mean by discrete data – it’s a category and there’s no “middle value” between each category

Page 9: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Line Graph

Jill's Elevation Change While Hiking

015030045060075090010501200

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5

Time (hours)

Ele

va

tio

n (

m)

Each value here has meaning (I could determine how Jill’s elevation at 3.2 hours) so I connect my data points with a line

Page 10: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Pie chart

Here I have data organized in a percentage out of 100 – this is good way to represent it

Page 11: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

A few final thoughts

• Scientists must represent their data graphically in a fair way that tells the most accurate story

• It is possible to change the scale of a graph to make it look like the data tells a much different story than the numbers actually show

• Additional labels might also be used to make the reader infer certain things from the same set of data

Page 12: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

For example…• At most, how different is the average rainfall

from this year’s rainfall?

This graph has been manipulated to make it look like there is a much bigger difference in rainfall than 0.4 cmBad scientist!

Page 13: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

A more accurate graph

Good scientist!

Page 14: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Another Example

Quarter, YearImage source: http://www.politicalmathblog.com/?p=401

Num

ber o

f job

s (t

hous

ands

)

U.S. Jobs by Quarter

What conclusions can you draw from this graph?

Page 15: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Here’s the same graph with a few extra labels…

Image source: http://www.politicalmathblog.com/?p=401

The data is the same but it could be used to create different inferences

Page 16: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Collecting and Graphing Discrete Data(title)

• A common example of discrete data is information collected when people complete surveys.

• Come up with a survey question you could ask of every student in this classroom (record on your paper under the title)– Example: Mrs. Ellis will be asking each student.

“What is the name of your 7th grade science teacher.

Page 17: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Identify the IV and DV (Record)

• IV =• DV =

Create a data table (on your paper)

• Begin collecting data

Page 18: Happy Tuesday Scientists! Today: Return scored work Grades Data and Graphs Study Guide Collecting Discrete Data Activity HW: Graph your data a second time.

Graph your data

• Since this is discrete data, what types of graphs would be appropriate to use?

6th period student drink choices

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pepsi coke rootbeer

dr.pepper

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# o

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ents

Series1