WorksheetsStatistical Methods 1- February quiz
Total questions: 10
Worksheet time: 10mins
The unexplained variance in a between-groups ANOVA is:
The variance between groups
The variance within groups
The variance in an unrelated sample
The expected variance in the population
Which of the following is not true about post-hoc tests?
They should only be conducted when a significant result is found
Typically they involve comparing the means of all combinations of pairs of groups
There are multiple post-hoc tests to choose from
This test should be conducted when we have previously predicted the outcome of our data
The unexplained variance in a repeated measures ANOVA is:
Residual variance
Variance between conditions
Variance within conditions
Variance from the population
A researcher wants to tests the effect of an educational intervention on the maths test scores of students, and they want to see if this differs in males and females. What type of analysis should the researcher conduct?
2 x 2 mixed design ANOVA
2 x 2 repeated measures ANOVA
One way repeated measures ANOVA
One way between groups ANOVA
Which of these assumptions about the Chi-square test is true?
Data must be normally distributed
No more than 20% of cells should have an expected frequency of less than 5
All cells should have an expected frequency greater than 3
The same participant observation must be seen in at least 2 cells
In SPSS, to conduct a Chi-square test with more than one variable, we would need to go to:
Analyse -> Non-parametric tests ->Legacy dialog -> Binomial test
Analyse -> Non-parametric tests -> Legacy dialog -> Chi-square test
Analyse -> Descriptive statistics -> Crosstabs
Analyse -> Descriptive statistics -> Frequencies
Some journals prefer to only publish data with interesting and significant results. What common problem does this contribute to?
p-hacking
The file drawer effect
Type I error
Type II error
Which of the following factors does not contribute towards the reproducability crisis?
Poor experimental design
Pressure to publish
Low statistical power
Incentives for following better research practice
A researcher wants to know if children report more severe injuries at A&E if they are wearing a Superman, Spiderman, Hulk, or Ninja Turtle costume. The following data shows a one-way ANOVA output for ratings of injury severity. What do the results suggest?
There is no significant effect of costume type on injury severity
There is a significant effect of costume type on injury severity (F(3,26)=1393.54, p<.001)
There is a significant effect of costume type on injury severity (F(3,26)=8.32, p<.001)
There is a significant effect of costume type on injury severity (F(1,26)=294.83, p<.001)
A researcher wants to know if there is a significant association between time pressures at work and an employee's ability to detach themselves from work. A Chi-square analysis was run on the data; what does the following output tell us?
There is no significant association between time pressure and work detachment
There is a significant association between time pressure and work detachment (Χ2(4)=15.55, p=.004)
There is a significant association between time pressure and work detachment (Χ2(4)=15.65, p=.004)
There is a significant association between time pressure and work detachment (Χ2(1)=12.32, p<.001)
