WorksheetsOne-way ANOVA Quiz
Total questions: 10
Worksheet time: 6mins
Which one is not an assumption of the ANOVA test?
Homogeneity of variance
Normality
Independence of observations
Equal population size for group
Which one is not a test for normality?
Skewness
Kolmogorov-Smirnov
Shapiro-Wilk
T-test
Which one of the following is an estimation of the experimental error?
Between-group mean square error
Within-group mean square error
Total mean square error
Between-group sum of squares
Which type of error can you reduce or avoid while designing the experiment?
Individual differences error
Measurement error
Mean square error
Experimental error
Which one is not a data transformation appropriate for recovering normality?
Square root
Logarithmic
Reciprocal
Inverse
The significance value alpha represents:
Type I error
Type II error
Power
Probability that the null hypothesis is true
What is the relationship between total, within-group and between-group deviation?
Total deviation = within-group deviation - between-group deviation
Between-group deviation = total deviation - within-group deviation
Within-group deviation = total deviation + between-group deviation
Between-group deviation = total deviation + within-group deviation
Consider a test with one independent variable and four levels. Each level has a sample of size 5. How much is the between-group degrees of freedom?
3
4
16
19
What set of parameters do you need to determine the critical F-value?
Alpha, within-group df, between-group df
Alpha, number of levels, within-group df
Number of levels, within-group df, between-group df
Alpha, number of levels, between-group df
In an ANOVA study, you have three groups:
Group 1 (n=20): z=1.8 (minor skewness)
Group 2 (n=20): z=0.8 (no skewness)
Group 3 (n=20): z=2.4 (substantial skewness)
What should you do?
No transformation needed, sample size is large.
Transform all groups
Transform only Group 3
Use non-parametric test
