Transcript Commute time for senior student`s high school experience

Commute time for senior student’s
high school experience
Mariana Lopez
Carlos Aguilar
Alex Rodriguez
Period 2
2012-2013
California Standards
 •8.0 Student organized and describe distribution of data by
using of different methods, including frequency table,
histogram, standard line and bar graphs, stem-and-leaf
displays, scatter plots, and box of whisker plots.
 •17.0 Students determine confidence interval for a simple
random sample from a normal distribution of data and
determine the sample size required for a desired margin of
error.
 •18.0 Student determine the P-value for a statistic for a
simple random sample from a normal distribution
Hypothesis
 We believe that the average commute time for senior
student’s in Century High School is going to be 6.
Data Collection
 The sampling technique used was cluster, we targeted the
seniors in our classes in order to get correct data.
 Some bias used in this process was that we asked our friends
first and then we asked random seniors.
 Example: We will collect data by using the cluster sampling
method. We assign senior students a scale 1-10, using a
number of 100 senior students in order to process the survey.
Data
 Throughout our survey on asking seniors, we used a scale from 1-10 while 1 being the
lowest and 10 being the highest response.
 On Campus We asked 100 Seniors
 Scale;
Score;
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1;
2;
3;
4;
5;
6;
7;
8;
9;
10;
1
5
3
7
25
8
13
27
13
16
Statistics
 From our survey, the mean number for seniors experience in
four years was 8.05 with sample standard deviation of 3.71.
We’re graduating high school for college… We hope.
Confidence Interval
 95 % Confidence Interval
 Z-Interval
 (6.1526, 7.4914)
 We are 95% confident that the mean number for high school
experience regarding seniors at Century is between 6.15 to
7.49.
Hypothesis Testing
 Hypothesis
Ho :   6(claim )
Ha :   6
 TestStatistics
Z  Test
P  Value : .0160    0.05
Conclusion:
At 5% level of significance, we
failed to reject Ho. There is
enough evidence to support
our claim.
Error Analysis
 Our sample mean is 8.05, and the 95% confidence level for
the population mean is between 6.15 to 7.49 for high school
experience.
 Our sample error is due to absent seniors who couldn’t
answer our survey and those who we didn’t ask because of
lack of time, we didn’t get all the seniors reports in our
survey as we wished. We might need more time and more
seniors to take the survey in order to have accurate data.
Conclusion
 We hypothesized that the Century seniors high school
experience is at an average of 6. In our survey of a hundred
seniors, we found the sample mean of 8.05 with a standard
deviation of 3.71. We conclude that the population mean for
senior high school experience is between 6.15 to 7.49 with
95% confidence. We test our initial hypothesis with 5% level
of significance and confirm our hypotheses is correct.