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Mathematical Requirements for Research Methods

Selecting an inferential test

  • 3 things to know
  • Component 01

Overview

Recall questions on what must be known before using a table of critical values, the three questions for choosing an inferential test, which test fits each design and level of data, parametric criteria, and why non-parametric tests are common.

What you need to know

Answer each one before you reveal it.

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Key term

Name the three questions that determine which inferential test to use.

Key term

Why are non-parametric tests used so widely in psychology?

Key term

Which test is used for a difference between two conditions with an independent measures design and ordinal data?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What must be worked out from the data before a table of critical values can be consulted?

    Model answer

    The observed value of the chosen test statistic must be calculated from the data, because it is that figure which is compared with the critical value.

  2. 2

    Name the three questions that determine which inferential test to use.

    Model answer

    Whether the study looks for a difference or a relationship, which experimental design was used, and what level of measurement the data is at.

  3. 3

    Which test is used for a difference between two conditions with an independent measures design and ordinal data?

    Model answer

    The Mann-Whitney U test.

  4. 4

    Which test is used for a difference between two conditions with a repeated measures or matched participants design and ordinal data?

    Model answer

    The Wilcoxon signed ranks test.

  5. 5

    Which test is used for a difference or association between categories with nominal data from independent groups?

    Model answer

    The chi-square test.

  6. 6

    Which test is used for a difference with a repeated measures design and nominal data?

    Model answer

    The binomial sign test.

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