To:  sbaker@odu.edu

From:  Thomas Meyer
tmeyer@ph.vccs.edu
276 656-0283
Patrick Henry Community College

Subject:  Statistics - w/  Dr.Spencer Baker - Homework Assignment #2, Ch 2 - Problem 18, page57.

Date: February 15, 2004

Question:


a.    Use the SPSS program and SPSS data bank for the data set named Donate.sav to obtain a frequency table for empathic concern (empathy).

Answer:

How to do it, step by step:

Load the CD containing data;
Load SPSS;
Double-click SPSS;
File - Open - Donate.sav; Press Enter
Analyze Menu - Descriptive Statistics - Frequencies
Scroll to and select Empathic Concern;
Click the move arrow;
Click OK

Right-click the picture
Choose Select Object
Select a location in Frontpage
From Edit menu choose Paste command
Save Frontpage.
Refresh the web.

 

 

 

Question:
 

b.    From the frequency table, construct a grouped cumulative frequency table.  Construct a grouped cumulative frequency curve from this table.

Answer:

How to do it, step by step:

Subtract High value - low value = 49-19=30

Divide the difference by 3, by 5, by 7 etc. until the interval is from 10 to 20.

30/3=10 or approx. 10 intervals with a width of 3 will cover up to 30 scores

Start with 18-20; that makes the midpoint a multiple of the interval width.

Grouped Frequency Table, Interval width =3,
Empathic Concern
from Donate.Sav
Score Interval Midpoint X Frequency f Cumulative frequency cf
48-50 49 4 120
45-47 46 9 116
42-44 43 7 107
39-41 40 14 100
36-38 37 15 86
33-35 34 12 71
30-32 31 17 59
27-29 28 15 42
24-26 25 16 27
21-23 22 10 11
18-20 19 1 1

 

The Grouped Cumulative Frequency Curve is sent via Jpeg attachment to email.

The graph of the cumulative frequency curve should look like the smooth edge between red and white of cumulative histogram below if the cumulative histogram had an infinite number of intervals spread across the relevant scores.

 

 

 

Question:
 

c.     Using the SPSS program, construct a grouped frequency histogram.  

Answer:

How to do it, step by step:

Load the CD containing data;
Load SPSS;
Double-click SPSS;
File - Open - A-drive - Donate.sav; Press Enter
Click Graphs menu; Interactive; Histogram;
Select Empathic Concern; drag this label to the X-axis; click OK; (Place a check in cumulative histogram if you want a cumulative histogram.)
Click the table; Click Edit menu; Click Copy command
On Frontpage click the location; Click Edit menu and click Paste command.
Save your work;
Refresh the web page.
 
Grouped Frequency Histogram
Empathic Concer
from Donate.sav		 Cumulative Frequency Histogram
Empathic Concern
from Donate.sav

 

 

 

 

Question:
 

d.    Using the SPSS program and SPSS data bank to construct a box plot of empathic concern (empathy) by the answer to the question. "Did you actually donate blood?" (donate).
 

Answer:

How to do it, step by step:

Load the CD containing data;
Load SPSS;
Double-click SPSS;
File - Open - A-drive - Donate.sav; Press Enter

Select Graphs menu - Boxplot...
Scroll to and select Empathic Concern
Drag and drop Empathic Concern on the Variable box
Scroll to and select Did You Actually Donate Blood
Drag and drop Did You Actually Donate Blood on the Category Axis
Click OK


Right-click the picture - Copy
Click the location desired on Frontpage
Edit menu - paste
Save
Refresh the web page.
 

 

 

 


filename: StatHW2Ch2Prob18page57TomMeyer.doc

Tom Meyer

Thomas Meyer