Flashcards
Sem título
Flashcards do conjunto (18)
- 1Why is a t-test used?To determine whether two means are significantly different from one another
- 2What is a one-sample test?The simplest, determines whether the observed mean is different from a population mean
- 3What is an independent t-test?Used when comparing means from two independent groups of individuals
- 4What is a paired t-test?Used when comparing the means of two sets of observations from the same individuals (e.g. repeated measures) or from pairs of individuals (e.g. when using a matched-pairs design)
- 5What are the assumptions of a T-test?Data is either measured at interval or ratio level, homogeneity of variance, drawn from population with normal distribution
- 6How do you perform a one-sample t-test on spss?Analyze> Compare Means> One-sample T test
Options>Expected valued (test value box) then can add confidence interval - 7How do you perform an independent T-test?Analyze> Compare Means> Independent-Samples T Test
- 8How do you perform a paired t-test?Analyze> Compare Means> Paired Samples T-test
- 9What is an ANOVA?A statistical test used for designs involving two or more groups or conditions and/or more than one independent variable (IV).
- 10What can the ANOVA tell us?Whether scores significantly vary across those conditions, but not precisely which pairs of conditions are significantly different.
- 11What are the assumptions of the ANOVA?- interval or ratio level data
- normally distributed population
- there is a homogeneity of variances - 12What is an F-ratio?The ratio of variance due to the manipulation of the IV and the error variance (variance brought by unwanted variables)
If the error variance is small, F-ratio will be greater than 1 - 13How do you know if the F ratio is significant?If the p value is the probability of getting the F-ratio by chance, and needs to be less than 0.05 to be regarded as significant
- 14What is a factor?The IVs
- 15What is a level?Similar to conditions
- 16What is a post hoc test?Used to make all the possible comparisons between conditions from ANOVA designs, as they control for the increased chance of obtaining a Type 1 error
- 17How do you run a post hoc on SPSS?Analyze> Compare means> One-way ANOVA> Post Hoc> 'Tukey'
- 18What is the signal : noise ratio?A conceptualisation of how T-tests and ANOVAs compare differences between conditions with random error (noise) in the data
Informações
- Descrição
- Psychology FlashCards sobre Sem título, criado por Charlotte Back em 31-12-2017.
- Criado por
- Charlotte Back
- Visualizações
- 0
- Avaliação