graphs new
TRANSCRIPT
• Graphs
• Estimation
61
• Accuracy & Precision
• Accuracy = How close is it to real value
• Precision = How close is each
measurement to each other
62
• Mean, Median, Mode
66
- Mean = Average
- Median = Middle
- Mode = Most often
- Graphs vs. Text
68
+ Which is better?
At age 1, Sarah was 75 cm
tall. By the time she turned 2,
Sarah had grown 10 cm. By
age 3, she had grown another
10 cm. At age 4, Sarah was
100 cm tall.
Bar Graphs
• Use
– Compare different items
– To one measured amount
Circle or Pie Graphs
• Use
– Compare different items
– To one whole amount
Line Graphs
• Use
– Compare one variable
– To another variable
Steps
• 1.Draw Axis
2. Label
• x- axis (Manipulated variable)
– What you did?
• y-axis (Responding variable)
– What you measured?
• Add Units!
3. Create Scale
• Start zero to highest number
• Distribute evenly
4. Plot Data
• (x,y)
- Line Graphs
+ Example Experiment – Boiling Water
70
- Line Graph
+ Draw Axis
√ X “What you changed”
√ Y “What was measured”
+ Create Scale
+ Plot Data
+ Draw best fit line
71
- Best Fit Line
+ Follow general trend
+ Include as many points as
possible
+ Have same # of points above
and below
72
- Identify Trends
74