Michael Short
803781208
Lab Week 9
Teen Texting
Question 1
a.
n=10
a.
The sample proportion is about .03 away from the assumed population
proportion.
n=100
a.
The sample proportion is about .008 away from the assumed
population proportion
n=1000
a.
The sample proportion is about .0049 away from the assumed population
proportion
b.
All three of these simulations are nearly normally distributed, unimodal,
with centers around .2. The actual centers can be found by looking at the graphs
below. Mean and standard deviation are also shown in the tables below.
c. n=10 (.2, +.3), n=100 (.2, +.3), n=1000(.2, +.4)
d. n=10 (+.209), n=100 (+.04), n=1000 (+.0209)
e. As the sample size increases the standard deviation decreases, because the sample
proportions are centered more around the true population proportion causing the margin
of error to be less.
N=10
N=100
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Question 2
a.
n=10
a.
The sample proportion is about .01 away from the population proportion
n=100
a.
The sample proportion is about .007 away from the population proportion
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 Fall '08
 Ioudina
 Standard Deviation, 10%, 20%, sample proportion, Michael Short

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