Upload
aniqa-masroor
View
212
Download
0
Embed Size (px)
DESCRIPTION
Select a result to help you to write a conclusion For a line graph, include an appropriate line (usually a line of best fit). Use mathematical comparisons between results to support a conclusion Plot a graph as in 6. Also, indicate the spread of data (through scatter graphs or error bars) Give clear keys where you are plotting multiple sets of data. Plot graphs or charts without help Your graph or chart displays your data in an appropriate way.
Citation preview
Handout 7: Marking Criteria (student speak) – Practical Data Analysis Strand I: Interpreting Data Strand I mark: What will be marked: 2 4 6 8 a.Graph Numerical processing of data
Record some results in a table Plot a graph using scales and axes given to you. Select a result to help you to write a conclusion
Plot graphs or charts without help Your graph or chart displays your data in an appropriate way. Do simple calculations (Eg. calculate means from repeated data)
Plot a graph or chart and correctly select the scales and axes For a line graph, include an appropriate line (usually a line of best fit). Use mathematical comparisons between results to support a conclusion
Plot a graph as in 6. Also, indicate the spread of data (through scatter graphs or error bars) Give clear keys where you are plotting multiple sets of data. Use complex processing to reveal patterns in the data (Eg statistical methods, use of inverse relationships or calculation of gradient of graphs)
b Your summary of the evidence
Write a simple conclusion where you note the differences between situations or compare individual results.
In your conclusion, identify the trends and general patterns in the data.
Describe relationships (formal or statistical) between the variables in your experiment.
Consider the limitations of your conclusions in relation to the scatter evident in your data. Discuss how strongly your evidence supports your conclusions.
c. The explanations you give
Make a link between what you have found out and anything you have seen or done before.
Use scientific ideas or explanations in your conclusion.
Use relevant scientific knowledge and understanding to justify the conclusion.
Use detailed scientific knowledge to explain all aspects of the given conclusion.
Strand E: Evaluation Strand E mark: What will be marked: 2 4 6 8 a. Your evaluation of your procedure (how you collected the data)
Make a relevant comment about how the data was collected and safety procedures.
Explain how your method/technique may have limited the accuracy or range of data collected.
Suggest improvements to the apparatus or techniques, or alternative ways to collect the data (without practical details)
Describe in detail improvements to the apparatus or techniques or alternative ways to collect the data, and explain why they would be an improvement.
b. Your evaluation of the reliability of your evidence (how reliable your results are)
Say whether the data collected is accurate or reliable (without reference to the data)
Make a note of the results that do not fit the general pattern If there are none, then say so.
Use the general pattern of results or degree of scatter between repeats as a basis for assessing accuracy and reliability.
Consider critically the reliability of the evidence, accounting for any anomalies.
c. Your evaluation of the reliability of your conclusion (how sure you can be)
Say how sure you are about your conclusions with reference to the procedure/techniques used (not the data).
Say how confident you are in your conclusion, with reference to the reliability of the data collected.
Discuss your level of confidence in the conclusions based on:
• The apparatus and techniques
• The range covered
• The reliability of data
Identify weaknesses in the data. Give a detailed explanation of what further data would help to make the conclusion more secure.