CourseCourseConceptConceptDocsDocuments

IB Maths AI HL Ahl 4 12 Hl Data Collection and Validity Questions

Practise designing unbiased surveys, categorising data for chi-square tests, identifying degrees of freedom and distinguishing reliability from validity.

Syllabus
First assessment 2021
Course
Mathematics: applications and interpretation HL
Level
HL

Exam points

  • Design a valid survey or questionnaire with relevant variables and unbiased, structured, precise wording.
  • Categorise numerical data appropriately for a chi-square test and determine the relevant degrees of freedom.
  • Distinguish reliability from validity and identify suitable test-retest, parallel-forms, content or criterion-related evidence.

Learn this topic

Study AHL 4.12 (HL)—Data collection and validity conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Maths AI HL Ahl 4 12 Hl Data Collection and Validity Questions question 1

[Maximum number: 1]

Juliet is a sociologist who wants to investigate if income affects happiness amongst doctors. This question asks you to review Juliet's methods and conclusions.
Juliet obtained a list of email addresses of doctors who work in her city. She contacted them and asked them to fill in an anonymous questionnaire. Participants were asked to state their annual income and to respond to a set of questions. The responses were used to determine a happiness score out of 100 . Of the 415 doctors on the list, 11 replied.

Describe one criticism that can be made about the validity of Juliet's investigation.

Juliet's results are summarized in the following table.

Table for Question IB Maths AI HL Ahl 4 12 Hl Data Collection and Validity Questions question 1 — IB Maths AI HL
All question bank results loaded