Lesson 1.3.6
1.3.6 Critical values and choosing parametric or non-parametric tests Quiz: OCR Psychology, Unit 1
20 questions
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Lesson 1.3.6, Critical values and choosing parametric or non-parametric tests: 20 multiple choice questions for the OCR Psychology (H567), Unit 1: Research methods (Component 01), written with Revision Ninja.
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The 20 questions
-
Which level of measurement is required to conduct a parametric statistical test?
- Ordinal
- Nominal
- Categorical
- Interval
-
A researcher tests if gender affects choosing psychology or maths. Which statistical test should be used?
- Unrelated t-test
- Chi-Square
- Mann-Whitney U
- Sign Test
-
What requirement for parametric tests means the population samples must have similar variances?
- Homogeneity of variance
- Normal distribution
- Linear regression
- Ordinal measurement
-
A study compares memory scores of participants before and after caffeine using ordinal data. Which test applies?
- Chi-Square
- Wilcoxon test
- Mann-Whitney U
- Related t-test
-
What is the standard level of significance used in psychological research to reject the null hypothesis?
- p ≤ 0.50
- p ≤ 0.01
- p ≤ 0.05
- p ≤ 0.10
-
For a Mann-Whitney U test, when is the result statistically significant at the chosen level?
- Calculated = 0
- Calculated ≤ critical
- Calculated ≥ critical
- Calculated > 1
-
What is the non-parametric equivalent of the related t-test for a repeated measures design?
- Mann-Whitney U
- Wilcoxon test
- Sign Test
- Spearman's Rho
-
An experiment uses two independent groups and interval-level reaction times with normal distribution. Which test fits?
- Related t-test
- Unrelated t-test
- Chi-Square
- Mann-Whitney U
-
What type of error occurs when a researcher falsely rejects a true null hypothesis?
- Sampling error
- Type II error
- Type I error
- Standard error
-
A researcher sets significance at p ≤ 0.001. Which risk increases significantly due to this strict level?
- Type II error
- Observer bias
- Demand characteristics
- Type I error
-
For which non-parametric test must the calculated value be greater than or equal to the critical value?
- Sign Test
- Spearman's Rho
- Wilcoxon test
- Mann-Whitney U
-
A study records if participants feel happier (plus) or sadder (minus) after music therapy. Which test fits?
- Chi-Square
- Sign Test
- Pearson's r
- Wilcoxon test
-
A researcher states a directional hypothesis before testing. Which critical value column must they check?
- Interval test
- Two-tailed test
- One-tailed test
- Parametric test
-
Reaction times are collected, but the distribution shows extreme skewness. Why fail parametric criteria?
- Skewed distribution
- Nominal scale
- Small sample
- Matched pairs
-
In a Chi-Square test, what is calculated as (rows minus 1) times (columns minus 1)?
- Degrees of freedom
- Calculated value
- Significance level
- Critical value
-
Ten participants were tested; two showed no change in score. What is N for the Sign Test?
- 12
- 2
- 8
- 10
-
Which statistical test is used for independent groups data collected at the ordinal level?
- Chi-Square
- Mann-Whitney U
- Unrelated t-test
- Wilcoxon test
-
A calculated chi-square value is 5.84 and the critical value is 3.84. Is the result significant?
- Impossible to tell
- Retain null hypothesis
- No, not significant
- Yes, statistically significant
-
Which parametric test is used for a repeated measures design with interval data?
- Unrelated t-test
- Related t-test
- Mann-Whitney U
- Wilcoxon test
-
For a Spearman's rho test, when is the result statistically significant?
- Calculated ≤ critical
- Calculated = 0
- Calculated ≥ critical
- Calculated < critical
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