1. 8th Grade Fremont Jr. High
Data Analysis
8th Grade
Fremont Jr. High

2. Scientific Method Review
Problem
Hypothesis
Experiment/Test IV DV
Constants
Control Group
Experimental Group
Materials
Procedure
Data Collection
Data Analysis
Conclusion

3. First Does the time of day cause some classes
Identify the Independent Variable (IV) and the Dependent Variable (DV)
Does the time of day cause some classes
to score higher on tests than others?

4. Hypothesis: The earlier in the day, the better the scores will be.

5. Organize Data Using a Table
Does the time of day cause some classes
to score higher on tests than others?
N E X T
Independent Variable goes here
Dependent Variable goes here
Organize Data Using a Table

6. Then…
Organize Data Using a Table

7. Let’s review graphs next…
Step 3
Choose the best graph to display the data.
Let’s review graphs next…

8. Which Graph is Best for this Data?

9. Which Graph is Best for this Data?

10. A Bar Graph is Used for Comparison

11. Which Graph is Best for this Data?
Franklin's Class
Grades
# of Students A 9 B 7 C 2 D 1 F 6

12. Which Graph is Best for this Data?
Franklin's Class
Grades
# of Students A 9 B 7 C 2 D 1 F 6

13. A Pie Chart Shows Percent-Whole Relationships
Franklin's Class
Grades
# of Students A 9 B 7 C 2 D 1 F 6
A Pie Chart Shows Percent-Whole Relationships

14. Which Graph is Best for this Data?
Suzy's Scores
Date
Test Scores (%)
January 25, 2005 67
February 25, 2005 71
March 25, 2005 87
April 25, 2005 85
May 25, 2005 98

15. Which Graph is Best for this Data?
Suzy's Scores
Date
Test Scores (%)
January 25, 2005 67
February 25, 2005 71
March 25, 2005 87
April 25, 2005 85
May 25, 2005 98

16. Line Graphs Show Change over Time
Suzy's Scores
Date
Test Scores (%)
January 25, 2005 67
February 25, 2005 71
March 25, 2005 87
April 25, 2005 85
May 25, 2005 98
Line Graphs Show Change over Time

17. Create a Graph
Title
Y Axis Label = DV
Key
Scale
X axis label = IV

18. The Axis Labels Have 3 Parts
The units of measurement
The IV or DV Label
The Scale

19. Data Analysis Central Tendency Relationship between the IV and DV
Slope of Line (Rate of Change)
Highs & Lows
Differences & Similarities
Error Analysis

20. Write the Data Analysis
Overall, the trend seems to be that scores increase as the day progresses. The highest average was 98%; the lowest 67%. The range is 31; the mean 81.6%; the median 85; there is no mode. This could be because students are more awake and alert later in the day.
This data could be misinterpreted however. It could also be that more “honor” students are in 3rd and 5th hours and this pulls up the average test scores. Further analysis should be done since some students were absent.
Science Test
Class
Period
Average Score (%) 1 67 2 71 3 87 4 85 5 98

21. Conclusion
State whether the hypothesis was supported / was not supported.
summarize the results of your data.
Hypothesis: The earlier in the day,
the better the scores will be.

22. Hypothesis: The earlier in the day, the better the scores will be.
Science Test
Class
Period
Average Score (%) 1 67 2 71 3 87 4 85 5 98
The Hypothesis was not supported by the data. Scores increased throughout the day with 5th period scoring 31% higher than 1st period.