Achievement objective S7-3

Indicators

Note: this content is new to the statistics curriculum.

A. Interpreting risk and relative risk:

• Calculates and interprets risk, selects baseline group, and calculates and interprets relative risk and writes a news clip reporting on findings.
• In a media article with text and/or a table, identifies absolute risk, baseline group and relative risk, and for relative risk, identifies the two groups being compared; identifies relevant missing information and justifies why it is important to include this information; identifies whether risk applies personally and why.

B. Identifying sampling and possible non-sampling errors in surveys, including polls:

• In a media report on a survey or a poll, identifies sampling error and explains the connection among sample, population, sampling variability, and sampling error.
• In a media report on a survey or a poll, identifies and evaluates, using critical questions (look under the heading critical questions in the work doc below), sampling methods and possible non-sampling errors such as self-selection, non response bias, behavioural considerations.

  • Statistical literacy critical questions – level seven (Word, 62 KB)

Progression

S7-3 links from S6-2 and to S7-1, S7-2, S7-4, S8-3.

What is new/changed?

• Risk
• Identifying non-sampling errors in surveys, including polls.

Possible context elaborations

• The legal blood alcohol level and the relative risk of having a fatal crash of 15–19 year olds compared to 30+ year olds:
  • Student activity

    • Blood alcohol levels in fatal crashes (Word, 87 KB)

  • Relative risk of 15–20 year olds having a traffic accident compared to 55–60 year olds. See Ministry of Transport crash facts
• Political polls, radio polls, web surveys
• Activity: Chocolate statistical literacy
• Newspapers: Exploring media-presented statistical information.

Assessment for qualifications

NCEA achievement standards at level 1 and 2 have been aligned to the New Zealand Curriculum. Please ensure that you are using the correct version of the standards by going to the NZQA website.

Aligned level 3 achievement standards will be registered by NZQA for use in 2013.

Full information on the level 3 draft standards and the alignment process can be found on NCEA on TKI.

The following achievement standard(s) could assess learning outcomes from this AO.

• AS91266 Mathematics and statistics 2.11 Evaluate a statistically based report
• AS91267 Mathematics and statistics 2.12 Apply probability methods in solving problems

Refer to the draft standards matrix.

Last updated September 26, 2012

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