From what I have understood about Pearson correlation coefficient I have created a visual illustration, I would like to know if this understanding looks correct.
Say I have a sample with 5 data points:-
x y
8 6
16 8
20 16
28 12
32 20
My goal is to...
The title of the question may not be clear. But that is the real difficulty I am facing. I am not able to understand logic behind coming up with this formula for covariance.
We know that the sample covariance formula is:-
cov(x,y)=\frac{\sum(x_i - \bar{x})(y_i - \bar{y})}{n-1}
I am not able...
The Central Limit Theorem specifically calls out a sample mean to be following normal distribution (for n>=30 ), But I am referring to certain text, and it is calculating z values for sample skewness and sample kurtosis assuming that these follow Normal distribution. Is it correct?
In short...
Hi,
I am studying about F ratio and how, as a random variable, it follows F Distribution. So let me explain what confuses me.
This is what the theory says -- We draw two random samples $sample_x$ and $sample_y$ from two different Normally distributed populations with equal variance...