# Thread: Which 2 sample hypothesis test to use?

1. ## Which 2 sample hypothesis test to use?

We did a movie project where we watched a film from the 70s and a film from the 2000s and counted the violent scenes in each movie. We have to do a 2 sample comparison.

The null hypothesis is that there is equal violence in both films

Alternate hypothesis is that the newer film is more violent

According to the instructions, "The 1970s movies is your "population". You are counting the number of incidents of violence. These are your "n". The newer movie is a sample."

These instructions make no sense to me. I can't do a mean test, as there is nothing to average together. That only leaves a proportion test, but for that I need a phat value, which is x/n. I have no idea what x could be...

2. ## Re: Which 2 sample hypothesis test to use?

I have some thoughts on this.

Let's say the 70's movie had 4 voilent scenes, then the sample size is 1 movie with the obsevation being 4.

Same goes for the 00's movie, sample size of one. These can't be t-tested b/c you can't have a standard deviation when n=1.

Considering your null hypothesis from above you simply compare the number of violent scenes in each film, are they the same number? This seems a bit simplistic, this is b/c your null hypothesis is in terms of the sample and should be in terms of the population. i.e. the difference in violence in 70s films are the same as 00's films.

I'm not sure how to proceed from here.