Tagged Questions

0
votes
0answers
18 views

ANOVA: dump data points instead of graphs [closed]

I want R to give me the points to use to make my own plots, rather than getting the plots that R creates. As I'm just a beginner with R, can you please tell me how to do this ?
-1
votes
1answer
99 views

How do I interpret the between subject result in mixed ANOVA?

We ran a mixed design repeated measures ANOVA for an RCT examining the utility of a specific treatment on knee range of motion (flexion). Our between subjects factor was study condition (treatment vs. ...
2
votes
1answer
174 views

How to interpret overlapping interaction plots?

I have an interaction plot that seems to be overlapping on top of one another, what does this signify?
0
votes
0answers
208 views

How to interpret R output for two-way repeated measures ANOVA

How do I interpret the following output from R for a two-way repeated measures ANOVA ...
1
vote
0answers
68 views

How to analyze differences of two groups with replicates?

I am trying to see if there are differences between two groups (background genetic mutants) and some values associated to them. Every group has 4 different gene types with two replicates each and its ...
2
votes
1answer
470 views

How to do ANOVA write-up when there is no significant effect at all?

I was conducting a 'recall of negative words' memory experiment with a two-way between-group ANOVA and got no significant main effects and no significant interaction! How can I go about explaining ...
1
vote
1answer
172 views

What can I conclude from the following one way ANOVA result?

I used a one-way ANOVA to test if importance levels of attributes have changed over the years (Data comes from a survey of consumers) with the following results (Mean ratings): ...
0
votes
1answer
144 views

Comparing two experimental groups and a treatment group using ANOVA

I performed a two-way ANOVA. I have one control group and 2 experimental groups. One experimental group received one strategy, the other group received another kind of strategy. Now, I want to know ...
3
votes
1answer
232 views

How do I interpret data from a 2x2 experiment with a floor effect that causes it to lack any variation in one cell?

I have performed a 2x2 experiment to measure the effects of two genetic factors on the occurrence and size of a rare birth defect. When an individual has the defect, we can measure its size (size is a ...
1
vote
1answer
108 views

Balance between randomization, interspersion and even initial conditions of experimental units

We are setting up a manipulative experiment in forest where we will test the effect of management on a number of health indicators. We have 1 factor, 3 levels, 3 plots each replicated 3 times; ...
5
votes
3answers
35k views

How to interpret F- and p-value in ANOVA?

I am new to statistics and I currently deal with ANOVA. I carry out an ANOVA test in R using aov(dependendVar ~ IndependendVar) I get – among others – an F-value ...
1
vote
0answers
226 views

Interpretation of 3-way ANOVA

I have 2 genes (tf1 and tf2), which are affecting a third gene (tg). By affecting a gene I mean the changes in the value of tf1 and tf2 changes the value of tg. what we measure in the whole experiment ...
3
votes
1answer
2k views

How to interpret a three-way ANOVA?

I have used a three-way ANOVA to analyze the the effect of genes, transcription factors, and different conditions on the gene expression. Now I have 9 elements, SSa, SSb, SSc, SSab, SSbc, SSac, SSabc, ...
3
votes
2answers
629 views

Explaining variation in a dependent variable based on a factorial experiment

I have run a factorial type test in a processing plant and have run a forward and backward step regression in R. How can I use the regression results and the anova created from the regression to ...
5
votes
2answers
2k views

If an ANOVA indicates no main effect and no interaction, should the lack of interaction be stated?

I measured response variable $Y$ at three levels of factor $A$ and four levels of factor $B$, $n=6$ reps/treatment. Results include $A$ has strong effects on $Y$. $B$ has no effect on $Y$ There is ...