I apologize if my question seems basic. I have the following data :

Code:

```
a=c(107,135,122,67,65,53,19,32)
b=c(35.5,26,9,4.5,5.33,9.83,0,1)
```

I want to know which type of analyses I need to run ?

Thanks a lot.

- Thread starter Ranfly
- Start date

I apologize if my question seems basic. I have the following data :

Code:

```
a=c(107,135,122,67,65,53,19,32)
b=c(35.5,26,9,4.5,5.33,9.83,0,1)
```

I want to know which type of analyses I need to run ?

Thanks a lot.

Ok I see so I reject my H0 that claim that variances are not significantly different isn't ?

Also, you used levene test, before I posted this, I asked myself, why not using t.test that calculate : variance within group / variance between group

Also, why not calculating correlation that can be an indicator of the intesnity of relation between variables ? (I've done that I have p<0.05 and coef correlation of 0.73)

I mean, how do you choose the statistical test in this context, this is the kind of question i'm stack with everytime I want to explore my data

You could also use two histograms (or overlaid histograms) to visualize data. Yeah, it just takes time to slowly increase your arsenal of procedures you remember to use during descriptive stats.

I asked myself, why not using t.test that calculate : variance within group / variance between group

Also, why not calculating correlation that can be an indicator of the intesnity of relation between variables ? (I've done that I have p<0.05 and coef correlation of 0.73)

I mean, how do you choose the statistical test in this context, this is the kind of question i'm stack with everytime I want to explore my data

Also, why not calculating correlation that can be an indicator of the intesnity of relation between variables ? (I've done that I have p<0.05 and coef correlation of 0.73)

I mean, how do you choose the statistical test in this context, this is the kind of question i'm stack with everytime I want to explore my data

on a more general note: you need to have one or more "real life" questions you want to answer with your data: e.g. group A is more variable then group B, or group A tends to have larger values etc. THEN, you translate the question to statiscal terms, like: the variance in A is different (larger) then in B. Then, you can search for a statistical test that will answer the translated question (Levene's being a good candidate, the t-test a very poor one for the variance) Then check the prerequisites for the chosen test and if applicable run the test.

regards