I have these using statements:

```
using MathNet.Numerics.Statistics;
using MathNet.Numerics.Distributions;
```

And I have these invocations of the functions:

```
var stats = Statistics.MeanStandardDeviation(tmp);
var F = new Func<Vector<double>,int,double>((b,i) => Distributions.CDF(0.0,1.0,mx[i][0]*b[0]+mx[i][1]*b[1]+mx[i][2]*b[2]));
```

Visual Studio will not recognize MeanStandardDeviation without the prefix of “Statistics”. And it will not recognize CDF, or Distributions.CDF, or Numerics.Distributions.CDF at all. I’m totally stymied about using CDF.

When creating the using statement for Distributions, I type “MathNet.Numerics…” it pops up the menu from which I can choose Distributions, but it does not recognize it when I try to use it.