AP Statistics 2.1 Statistical Inference
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|AP Statistics||Statistical Inference|
|Sampling And Experimentation||Generalizability of Results and Conclusions|
|Test Prep||AP Statistics|
here the potential answers.. Okay in other words who
causes that five minutes after the bell stampede every morning? Is it the sweaty [Students scramble into the school as alarm bell rings]
two wheelers, or the amateur NASCAR drivers in the parking lot well to get the answer [Motorbike and car arrive at school and students appear]
the principal has hired a statistician who proceeded to calculate a 95%
confidence interval that percentage is for the difference between
the proportion of bike riders who were late and the proportion of car drivers [person riding a bike and a car ride past the principal]
who were late...So besides being curious about what they're serving in the
cafeteria for lunch what else does the guy with the clipboard need to know [Man holding a clipboard in the school corridor]
nothing.. exactly, he has what he needs there's no missing link here people stay
with us for a second since the confidence interval was given we don't [Student discussing sample size at the front of the class]
need sample sizes an actual proportion so we can eliminate C and D as possible
answers we're comparing bike riders to car drivers and those positive numbers in
the confidence interval indicates that bike riders are late more than car [Bike and car appear]
drivers which means that A is the correct answer the only other conclusion
to be made from this exercise is that there are more bike riders than car [Students holding bike helmets outside the principal's office]
drivers waiting outside the principal's office..no one ever said confidence
intervals were fair.