Type of study versus a true experimental design.

That's always possible when you're doing these types of studies.

Disciplines.

So you can think of this in those terms.

Last segment we talked about the power of randomized experiments.

But they lack the power of randomized experiments, and I'd like to show you.

We couldn't get at the causal mechanism just by doing correlations and correlations and correlations.

And they very helpfully tell you how to go and find the paper.

As a particle physicist, I study the elementary particles and how they interact on the most fundamental level.

I want to contrast that now. With, observational studies.

Hi. Welcome to Statistics One. This is the first lecture where we'll talk about randomized experiments and observational studies.

An experiment is when we have random assignment conditions and something is minipulated in independent variable.

Without randomized experiments, without random assignment to conditions, we can never really be sure.

Dorset Labs says no.

You know other people more then you know yourself

But remember, go back to lecture one, where we made the distinction between randomized controlled experiments and observational studies.

They won't matter which part we take.

How low can you sink?

if children have interest then education happens.

What kind of shit research are you doing?

Retrospective

One of which he compared to chess, which is theoretical elegant cosmology, which is very precise and clean.

You watch?

So experimentalists use randomized experiments.

The Laboratory

All of it? The research, the blogs.

I watch.

Observe.

Observing.

How many masks do you need?

So if I want to know what's the probability of the two sided coin, all Bayes' theorem is saying, well, OK, we observed that we got the two sided coin.

The laboratory, Wilma.

Merrick Institute.

Crazy house.

Ectoplasmic research.

In the lab.

I'm doing research for an article...

Is, know that when I, I make this distinction in my language between a study and an experiment.

In a randomized experiment, or whether we're just dealing with, observational studies, and the analysis of correlations.

We need to discover what those differences are.

Chief Investigator

So this is a different approach.

And so I said, You know what?

(Laughter)

my research.