Lab Overview
Scenario/Summary
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MATH 221 Statistics for Decision Making
Week 2 iLab
Name:
Statistical Concepts that you will learn after completing this iLab:
Using Excel for Statistics
Graphics
Shapes of Distributions
Descriptive Statistics
Empirical Rule
Week 2 iLab Instructions-BEGIN
Data have already been formatted and entered into an Excel worksheet.
Obtain the data file for this lab from your instructor.
The names of each variable from the survey are in the first row of the Worksheet.
This row has a background color of gray to identify it as the variable names. All other
rows of the Worksheet represent a certain students’ answers to the survey questions.
Therefore, the rows are called observations and the columns are called variables. On
page 6 of this lab, you will find a code sheet that identifies the correspondence
between the variable names and the survey questions.
Follow the directions below and then paste the graphs from Excel in the grey areas
for question 1 through 3. Type your answers to questions 4 through 11 where noted in
the grey areas. When asked for explanations, please give thorough, multi-sentence or
paragraph length explanations.
PLEASE NOTE that various versions of Excel may have slightly different formula
commands. For example, some versions use =STDEV.S while other versions would
use =STDEVS (without the dot before the last “S”).
The completed iLab Word Document with your responses to the 11 questions will be
the ONE and only document submitted to the dropbox. When saving and submitting
the document, you are required to use the following format: Last Name_ First
Name_Week2iLab.
Week 2 iLab Instructions-END
This study source was downloaded by 100000849840424 from CourseHero.com on 07-18-2022 21:52:29 GMT -05:00
1. Create a pie chart for the variable Car Color: Select the column with the Car
variable, including the title of Car Color. Click on Insert, and then
Recommended Charts. It should show a clustered column and click OK. Once
the chart is shown, right click on the chart (main area) and select Change Chart
Type. Select Pie and OK. Click on the pie slices, right click Add Data Labels,
and select Add Data Callouts. Add an appropriate title. Copy and paste the
chart here. (4 points)
Count of Car Color
white; 1; 3%
black; 7; 20%
silver; 7; 20%
black
blue
dark blue
green
orange
red; 4; 11% red
silver
blue; 9; 26% white
orange; 1; 3%
green; 5; 14%
dark blue; 1; 3%
2. Create a histogram for the variable Height. You need to create a frequency
distribution for the data by hand. Use 5 classes, find the class width, and then
create the classes. Once you have the classes, count how many data points fall
within each class. It may be helpful to sort the data based on the Height variable
first. Create a new worksheet in Excel by clicking on the + along the bottom of
the screen and type in the categories and the frequency for each category. Then
select the frequency table, click on Insert, then Recommended Charts and
choose the column chart shown and click OK. Right click on one of the bars and
This study source was downloaded by 100000849840424 from CourseHero.com on 07-18-2022 21:52:29 GMT -05:00
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