STAT 30100: Elementary Statistical Methods I Project # 3 FALL 2015

STAT
30100: Elementary Statistical Methods I
Department of Mathematical Sciences
School of Science, IUPUI

Project
# 3

FALL 2015, Total 25 points

Due Date:11/18/2015

Name:________________________________________________________

Important Instructions:

You must work independently to
answer all questions. Provide complete and clearexplanations to all
questions. Graphs must be labeled for clear communication. (Remember the
importance of context throughout!)Your project must be typed, easy to read
and have the answer to each question identified by question number. Copy and
paste the specified StatCrunch output, including graphs and number summaries,
into the specified table. The indicated StatCrunch output MUST appear with the
discussion, not as separate pages. Also, consider at least three decimals for
your calculation throughout the project.

Problem # 2

Studies
were conducted in Los Angeles to determine the carbon monoxide (CO)
concentration near freeways. The basic technique used was to capture air
samples in special bags and to then determine the carbon monoxide concentration
by using a spectrophotometer. The measurements in ppm (parts per million) over
a sampled period during the year can be found in the Excel file CARBON.xlsx via
Oncourse. Find a 90% confidence interval for µ, the mean CO concentration (in
ppm) during the year.

Consider
the following steps for your answer.

Label the parameter. [1 pt]Verify all required conditions. (using
StatCrunc, produce a boxplot to verify the normality condition) [3
pts]Interval calculations. (Both
StatCrunch output and manual calculation must be reported; note that answer
should be same in both cases) [2+2
= 4 pts]

StatCrunch output:

Manual
calculation:

Interpret your result in part (iii) in the context of the problem. [1 pt]

 

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