I was trying to run the StandardHypoTestDemo.C on my workspace and I noticed that result are wrong when the poi has no range.

You can see the complete code here:

nbviewer.ipython.org/gist/wiso/0 … 66000a78d5

If i define my poi with a range

`nsig = ws.factory('nsig[100, 0, 1000]') # POI has range`

I get the correct result (as data I am using an bkg only asimov)

```
Results HypoTestAsymptotic_result:
- Null p-value = 0.5
- Significance = -0
- CL_b: 0.5
- CL_s+b: 0.999998
- CL_s: 2
Asymptotic results
Expected p -value and significance at -2 sigma = 0.00515873 significance 2.565 sigma
Expected p -value and significance at -1 sigma = 0.000181925 significance 3.565 sigma
Expected p -value and significance at 0 sigma = 2.49742e-06 significance 4.565 sigma
Expected p -value and significance at 1 sigma = 1.31073e-08 significance 5.565 sigma
Expected p -value and significance at 2 sigma = 2.60157e-11 significance 6.565 sigma
```

but if I define the poi without a range I get other numbers:

```
Results HypoTestAsymptotic_result:
- Null p-value = 5.60319e-06
- Significance = 4.39248
- CL_b: 5.60319e-06
- CL_s+b: 0.973967
- CL_s: 173824
Asymptotic results
Expected p -value and significance at -2 sigma = 7.28557e-06 significance 4.33507 sigma
Expected p -value and significance at -1 sigma = 4.77529e-08 significance 5.33507 sigma
Expected p -value and significance at 0 sigma = 1.18614e-10 significance 6.33507 sigma
Expected p -value and significance at 1 sigma = 1.108e-13 significance 7.33507 sigma
Expected p -value and significance at 2 sigma = 3.8725e-17 significance 8.33507 sigma
```