Skip to content | Accessibility - list of access keys used on this site | Sitemap
Find what you need to know

Home > Subjects > Mathematics > Level 3 - statistics and modelling > 3.5 Statistical investigation (AS90645) > Achievement criteria

  • Subject: Mathematics
  • AS: AS90645
  • Level: 3
  • Credits: 3
  • Internal

Statistics and modelling 3.5 Select and analyse continuous bi-variate data

Achievement criteria

The level of achievement that you reach is decided by the questions that you answer correctly.

Achievement

  • You select and analyse continuous bi-variate data.
  • You may collect the data or it may be provided. It should be data for which a linear model is appropriate. Where the data is provided it will involve more than one pair of variables from which you select a pair.
  • The analysis will involve:
    • developing a purpose statement from the data selected
    • graphing data
    • using regression to establish a linear relationship between a pair of variables
    • describing the relationship between at least one pair of variables in context.

Achievement with Merit

  • You need to reach Achievement.
  • You carry out an in-depth analysis of bi-variate data.
  • Your analysis will include some of the following:
    • comparing the relationship between more than one pair of variables
    • discussing the appropriateness of the model
    • interpreting correlation coefficients, r, and coefficients of determination, R2, when appropriate
    • making predictions from regression equations (interpolation and/or extrapolation)
    • use of residuals
    • discussing the difference between correlation and causality when appropriate.

Achievement with Excellence

  • You need to reach Achievement with Merit.
  • You report on the validity of the analysis.
  • The report will include justified comments on some of the following:
    • method(s) of analysis
    • assumptions made
    • limitations
    • improving regression models, for example discussing the effect of outliers, fitting piecewise or non-linear models
    • alternative approaches
    • data source or data collection method if you collect your own data
    • potential sources of bias
    • relevance and usefulness of evidence
    • how widely the findings can be applied.

Back to top

1

People logged in

52

People surfing this site

Most recent posts

English Level 1
2012 Level 1 English exam. How did it go?

Posted by: Future Engineer

6:06pm 11.02.2013

English Level 2
Making connections book choices

Posted by: muz1kbox

5:31pm 26.02.2013

English Level 3 & Scholarship
3.8 research task (AS 91479)

Posted by: englishteacher5

9:21pm 17.02.2013

Mathematics Level 1
Algebra and graphs (91027, 91028, 91029)

Posted by: Future Engineer

9:41am 18.02.2013

Mathematics Level 2
Co-ordinate Geometry (91256)

Posted by: mathsteacher

10:47pm 26.02.2013

Mathematics Level 3 Calculus & Calculus Scholarship
3.5 (AS91577) Complex numbers and algebra

Posted by: mathsteacher

11:49pm 26.02.2013

Mathematics Level 3 Statistics & Statistics Scholarship
3.12 (AS91584) Statistics reports

Posted by: mathsteacher4

8:51pm 25.02.2013

Sciences Level 1
SCIENCE 1.1 ASPECTS OF MECHANICS 90940 EXTERNAL EXAM

Posted by: scienceteacher3

8:26pm 12.02.2013

Science Level 2 & 3
Start of NCEA Level 2

Posted by: scienceteacher5

10:10am 25.01.2013

Physics Level 2
physics on tki

Posted by: scienceteacher6

10:41pm 26.02.2013

Physics Level 3 & Scholarship
PHYSICS 3.4 MECHANICAL SYSTEMS

Posted by: scienceteacher3

8:04pm 26.02.2013

Biology Level 2, 3 & Scholarship
Need insects for bio internal

Posted by: scienceteacher5

12:01pm 04.04.2013

Chemistry Level 2, 3 & Scholarship
chem 2.4 bonding- all questions here

Posted by: baller.0

8:03pm 26.02.2013

Other
University in General

Posted by: Keenlearner

1:18pm 27.02.2013