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Mathematical Requirements for Psychology (Appendix A: AS Unit 2 and A2 Unit 4)

Algebra

  • 3 things to know
  • AS Unit 2 and A2 Unit 4

Overview

Twenty recall questions on Algebra.

What you need to know

Answer each one before you reveal it.

Your recallNot started
Numbers

What do the symbols ≤ and ≥ mean, and how is ≤ used when reporting the outcome of a statistical test?

Key term

In Spearman's formula, what does n stand for, and what happens to the coefficient as ∑d² gets larger?

Key term

A test returns p = 0.07 in a study using the 0.05 level. How is the relationship written in symbols, and is the result significant?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What do the symbols ≤ and ≥ mean, and how is ≤ used when reporting the outcome of a statistical test?

    Model answer

    ≤ means 'less than or equal to' and ≥ means 'greater than or equal to'. A significant outcome is reported as p ≤ 0.05, meaning the probability that the result is due to chance is 0.05 or less.

  2. 2

    Write in symbols the statement that the probability of the results being due to chance is 1% or less.

    Model answer

    It is written p ≤ 0.01.

  3. 3

    What does the symbol ∝ mean, and what is an example of its use with psychological data?

    Model answer

    It means 'is proportional to', for example writing that total study time ∝ number of trials completed when each trial takes the same length of time.

  4. 4

    What does the symbol ≈ mean, and when is it used in reporting a result?

    Model answer

    It means 'is approximately equal to', and it is used for a rounded or estimated value, such as writing that a mean of 14.3667 is ≈ 14.4.

  5. 5

    A Mann Whitney U test gives an observed value of 12 against a critical value of 20. How is the relationship between the two values written using the correct symbol?

    Model answer

    The relationship is 12 < 20, so the observed value is smaller than the critical value.

  6. 6

    A test returns p = 0.07 in a study using the 0.05 level. How is the relationship written in symbols, and is the result significant?

    Model answer

    The relationship is p > 0.05, so the result is not significant and the null hypothesis is retained.

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Psychology Past to Present — The Five Approaches
Contemporary Debates
Principles of Research and Application of Research Methods
Mathematical Requirements for Psychology (Appendix A: AS Unit 2 and A2 Unit 4)

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