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Statistics & Probability Videos 5 videos
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Description:
Alexis wants to find out approximately how many hours of television the people in her hometown watch per day.
Which group should she survey for the most representative results?
Transcript
- 00:01
Okay Mash bumpers here kind of word problem ish thing
- 00:05
for you Alexis wants to find out approximately how many
- 00:08
hours of television the people in her home town watch
- 00:10
per day Which group should she survey for the most
- 00:14
representative results But one of the golden rules of statistics
Full Transcript
- 00:23
is that samples must always be random for the results
- 00:26
to be valid And representative Think about it this way
- 00:29
If we wanted to know the average amount of netflix
- 00:31
watch by people in new york while we wouldn't survey
- 00:34
the top ten self proclaimed netflix addicts we'd want to
- 00:38
survey ten random people in new york Well random samples
- 00:41
should include a diverse group of people like a group
- 00:43
of high school students A isn't diverse in terms of
- 00:46
age while group of wealthy people isn't economically diverse Alexis
- 00:50
mom's co workers probably aren't very diverse in terms of
- 00:53
money or age like annie but a few people she
- 00:55
encounters randomly in a highly trafficked grocery store Maybe that's
- 00:59
not perfect but well everybody's got to eat right And
- 01:02
that's the most diverse of this group though the answer
- 01:04
is d
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