This was a randomized trial.

Similarly, using a randomized control trial in rural Pakistan,

And you can do the same randomized, controlled trial for social policy.

Novocure conducted its first phase three randomized trial in patients with recurrent GBM.

So what we did is we did a randomized, controlled trial in 134 villages in Udaipur Districts.

Run Randomized Slide Show

So experimentalists use randomized experiments.

learning. Randomized decision trees, another technique from machine learning.

The breaking trial

Last segment we talked about the power of randomized experiments.

like, and it almost looks like a randomized experiment, right?

It was a randomized control study published in The Lancet.

So in this first segment, let's talk about randomized experiments.

Now we know they are effective because of randomized experiments.

Is again to drive home the power of those randomized experiments.

So we'll start out with two examples of randomized controlled experiments.

Free Speech on Trial

I bore this trial.

No trial, nothing. Guilty!

He ran his trial.

Next was this trial.

'What trial is it?'

He entered our trial.

But who's on trial?

He got a fair trial. What do you think that trial cost?

So that's why these observational studies aren't as powerful as randomized experiments.

The first, I'll give you a couple of examples of randomized experiments.

Straightforward, fair trial, full investigation.

It's my trial by fire.

Another trial by fire, perhaps?

Don't you have another trial

This is the second trial.

You see, during your trial...

You are not on trial.

Was a fair trial, not?

The S.E.C. Isn't on trial.

I said it during the trial, and I said it after the trial. Guilty.

This is indeed the manifest trial.'

This was indeed a plain trial.

It was certainly an open trial.

that surely was a manifest trial,

That was indeed a clear trial.

Indeed, this was the clear trial.

He took the car on trial.

We learn by trial and error.