Does this mean that my analysis is invalid?

This is for Bayesian Linear Regression.

Thanks.

```
with pm.Model() as model:
sigma = pm.Uniform('sigma', lower=800, upper=810)
intercept = pm.Uniform('Intercept', lower=0, upper=10)
cost_coeff = pm.Normal('cost_coeff',mu=-1.5,sigma=2)
ad_coeff = pm.Normal('ad_coeff',mu=3,sigma=1)
likelihood = pm.Normal('y', mu=intercept+(cost_coeff*X_train['Cost'])+(ad_coeff*X_train['Ad Responses']),sigma=sigma, observed=y_train)
trace = pm.sample(draws=5000,tune=1000)
```