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**Unformatted text preview: **Reanna Echeverria
12/13/2011
Statistics Project
This statistics project will inform you on how many people cross the street, with or
without waiting for the pedestrian countdown signal, whether they pushed the crosswalk button
or not. I collected the data by sitting at the university and Lincoln crosswalk on December 1,
2011 from 9:30am to 10:30am. The null hypothesis is that there is no relationship between
pushing the crosswalk button and waiting for the pedestrian countdown signal. The alternative
hypothesis is that there is a relationship between pushing the crosswalk button and waiting for
the pedestrian countdown signal.
What I found in my study seems like it would not make sense. The total number of
people that pushed the crosswalk button was 17. Out of that 14 waited for the pedestrian
countdown signal, and 3 didnt. The total number of people that didnt push the crosswalk button
was 64. Out of that 53 waited for the pedestrian countdown signal, and 11 didnt wait. What was
going on was that everyone was trying to get to class so there were big groups of students, one
person out of the big group would push the pedestrian countdown signal, and most of them
would wait. There were some times that there were only a couple people on the crosswalk, and
most of the time people didnt wait when there were not a large group of people waiting. The
significance level I used was the one in the book for a two sided significance test for a population
mean = 2.42. That being said, my p-value was too high to accept the null hypothesis, therefore
the alternative hypothesis is accepted as true.
In conclusion, I found that most people did not push the crosswalk button, but waited for
the pedestrian countdown signal. A question that could be perused in further study is: would the
same results come from different countries? (My friend who is Brazilian said that in Rio de
Janeiro everyone waits for the countdown, or else they would get run over! )
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