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### Course: Digital SAT Math > Unit 3

Lesson 10: Evaluating statistical claims: foundations# Data collection and conclusions — Basic example

Watch Sal work through a basic Data collections and conclusions problem.

## Want to join the conversation?

- Is the use of calculator allowed in the digital SAT(13 votes)
- yes, the use of calculator is allowed through out the whole math section of the SAT(27 votes)

- Isn't it causation rather than causality?(9 votes)
- You just need to understand the concepts not to learn the terms for SAT.(1 vote)

- is there an easier video about this?(5 votes)
- I'm afraid this is the easiest video about Data collection. What's the part you didn't get?(7 votes)

- Hi, I had a question about specifically comparing the mean, median, and/or mode while analyzing data distributions such as bar graphs, scatter plots, and etc. Is there a video that can help me with that? If there can be a video on each type of distribution that would be nice.(7 votes)
- what is a simple definition of a population?(4 votes)
- A group of people for which we want to estimate a parameter.(2 votes)

- I don't think that option A is correct unless we rewrite it as: "Most people who like a certain American movie will like its Indian remake"(1 vote)
- Answer choice A) says "Most people who like
*the*original movie will like the remake." Using "the" instead of "a" here makes it clear that we're talking about the same certain American movie as the question was talking about. It's the same thing as saying "Most people who like a certain American movie", so is a fine answer in my opinion.(8 votes)

- What grade level or subject would cover data collection and conclusion? Like a how linear and exponential growth would be in the algerbra subjects here on Khan Academy, what would data collection and conclusions be under, or at least start its foundation?(6 votes)
- I learned this stuff in my AP Stats class, which I chose to take as an elective in high school instead of pre-calc. Lots of people also said they learned this in AP Psych(1 vote)

- I can not hear any sounds as my video is playing. Please what do I do?(2 votes)
- personally, I like movie remakes if they do it right(2 votes)
- 70% can be most? ok :|(2 votes)

## Video transcript

- [Tutor] A film historian
selected 120 people at random from a group of people who indicated that they liked
a certain American movie. The 120 people were shown an
Indian remake of the movie and then asked whether they
liked or disliked the remake. Of those surveyed, 70% said they liked the remake. Based on the survey results, which of the following conclusions about the remake is valid? Pause this video and see if
you can work through this before we do it together. All right, now let's work
through this together. So choice A says, most people
who like the original movie will like the remake. So can we make that conclusion? So let's see. They
selected 120 random people from a group who indicated
that they liked the movie. Okay. So these are,
this is a random sample of the folks who liked the movie, and we can see that 70%
of them liked the remake. So yes, it does seem
that most of the people who like the original
movie will like the remake based on this sample of 120. So I'm liking choice A, actually. Let's see, choice B, most people who dislike the original movie will dislike the remake. Well, can we make that conclusion? Because we haven't sampled
people who dislike the movie, and because we haven't sampled
people who dislike the movie, we haven't asked them whether they like or dislike the Indian remake. So we can rule this one out. So A is still holding up. At least 70% of people who watch movies will like the remake. Well, no, we can't make that conclusion because they didn't take a hundred, they didn't take a sample of 120 people from people who watch movies, they took 120 person sample from people who liked the
original American movie. So you can't make the 70% claim about all people who watch movies. So let's rule that out. And choice D, at least 70% of people
who watch Indian movies will like the remake. So that would be a different if to make this conclusion, you would have to randomly sample people who watch Indian movies and see what percentage
of them like the remake. That was not what was done here. So we could rule that one out as well. So we are liking choice A.