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AP U.S. Government 1.5 Political Beliefs and Behaviors 224 Views


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AP U.S. Government 1.5 Political Beliefs and Behaviors. In what sort of poll must every member within the universe have an equal probability of being surveyed?

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Transcript

00:00

Thank you We sneak and here's your shmoop too sure

00:05

brought to you by random samples We'd prefer to choose

00:08

ours but we're not ones to turn down free food

00:11

Always been a taste wishbone right in what sort of

00:14

pole must every member within the universe have an equal

00:17

probability of being surveyed and hear the potential answers Right

00:23

Okay well when it comes to pulling the more people

00:25

we survey the more likely the opinions of the group

00:27

will match the opinions of the universe as a whole

00:30

Try that one on for equally representational size Goldie locks

00:37

Alright what all individuals have an equal probability of being

00:40

surveyed in be an exit poll Well exit polls are

00:42

conducted after we've voted so we'd only be capturing individuals

00:46

participating in their civic duty that gives us access to

00:49

only the brightest stars in the red white and blue

00:51

Would we obtain an equally representative sample in c A

00:55

tracking poll Well tracking polls are designed to monitor change

00:58

over time like for a presidential approval rating And while

01:01

those surveyed might be random it's not absolutely required though

01:05

the chances for cr well trending negative can we get

01:08

a perfectly random distribution indy an opt in poll Well

01:12

equally representative poles need to ensure that everyone has a

01:15

well equal chance of being surveyed Opt in polls however

01:19

have a built in barrier as the on ly people

01:21

answering choose to participate What about e A quota sample

01:25

poll will quote a sample Polls target very specific groups

01:28

of people like red heads or people who own flying

01:31

squirrels as pets So there's no way in the well

01:34

universe that we'd obtained a perfectly random sample Hey rocky

01:38

watch me pull a rabbit out of the head Flying

01:41

squirrel bullwinkle remember him which means that all individuals would

01:45

have an equal probability of being surveyed in a a

01:48

random sample poll when we want to pull that accurately

01:52

captures how the entire population feels about a certain political

01:55

issue like access to healthcare A random sample poll is

01:58

the way to go Random samples are designed to be

02:01

representative of the entire group were trying to learn about

02:04

and give all individuals in the population a supposedly equal

02:07

chance of being surveyed The option is the correct answer

02:11

If we don't have a random sample our data might

02:13

be compromised in some way which means we'd have to

02:16

start all over So let's Stick with the random sample 00:02:18.95 --> [endTime] It'd really biased sometime in the long run

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