# All Questions

220 views

### Multivariate normality test from R's energy

Could someone explain me which is the null hypothesis of the energy test of multivariate normality (R package energy)? By using this test I obtained a very ...
219 views

### What to do when the intersection of some time series doesn't contain enough data point?

I have to do some studies on time series, which involve computing the covariance matrix. However, my time series span on different time intervals and their intersection is too short to provide me a ...
88 views

### Where can I find accessible reference to vector autoregression?

I would like to understand the topic conceptually rather than through equations
696 views

### Explanation of the Kolmogorov-Smirnov Test with applications in Java

I'm trying to apply the Kolmogorov-Smirnov test for goodness-of-fit to a dataset. I have a large set of values, and would like to know whether it fits a Poisson distribution with given $\lambda$. As ...
74 views

### Formulate hypotheses when $\mu_A < \mu_B$ is different from $\mu_A > \mu_B$

I'm testing two different settings (say 'A' and 'B') for a machine. From physical arguments, I know that $\mu_B >= \mu_A$. If really $\mu_B < \mu_A$, there's something fundamentally wrong with ...
489 views

367 views

### Calculating covariance for a non-strictly-stationary white noise process

I'm reading Hayashi's "Econometrics", and in Chapter 2, page 101 he discusses the following white noise process: I understand the calculations for the expected mean and variance, but I can't ...
154 views

### Checking what attributes of a population made objects more likely to do certain action

I'm pretty lost at how to approach this, and particularly with regards to the terminology; so please feel free to point to resources, fix my question name, etc. Thanks. I used R back in college, I've ...
1k views

### Will the silhouette formula change depending on the distance metric?

I am using Silhouette width to compute the best value for k in k-means. As I am performing document clustering, I am calculating the values of a and ...