Nayland College

Nayland College - Mathematics

Home . Year 9 . Year 10 . Level 1 . Level 2 . L3 Statistics . L3 Maths . L3 Calculus . About . Links

NZAMT NZQA NZ Grapher NZ Maths Census at School Study It

Writing a Conclusion

1.11 Bivariate Home | Assessment Criteria | Ask a Question | Make a Plan | Collecting Data | Cleaning Data | Making Scatterplots | Describing Scatterplots | Outliers | Line of Best Fit | Population Inference | Conclusion | Revision


Making a population inference - Conclusion

From the sample analysis we can make an inference about the population

Sample statistics may be of use: Mean Median, Mode, Minimum, Maximum

Making a conclusion based on the scatter plot and equation.

Answering our research question, with evidence. "I notice that..."

Population Inference Class notes, Blank notes

Writing a Conclusion Class notes, Blank notes

pg292, pg368

pg294 Ex18.02, pg370 Ex26.02



In your conclusion you MUST refer back to your research question
To answer the research question use…

“I notice that…. “

The investigation is to be written as a report including:

  1. Write a research question “Is there a relationship between ……….”

  2. Make a plan to collect data, record data, make a scatter plot, and answer the research question

  3. Identify if variables are 'explanatory' and 'dependant

  4. Make a scatter plot investigating the relationship.

  5. Discuss any groups and outliers.

  6. Add a ‘line of best fit (regression line)

  7. Use the equation to make predictions

  8. Make a population inference.

  9. Discuss possible assumptions, limitations, improvements, and bias

Talk about:
The relationship (State the obvious “as height of students increases, arm span also increases) and Strong/Weak/Linear/Non-Linear/Constant Scatter /Non-Constant

The trend line (slope and equation) what it means and how well it represents the data (for all or part of the data range)

How the trend line can be used to make predictions and how appropriate these predictions are.

Any outliers or groups and what may have caused this.

The sample statistics referring to central tendency and spread

How well (or not) the sample represents the population.

Were there any bias, limitations, errors, improvements that were possible?




back to top