Part I: Concepts
All Questions
These questions are based on the Nolan and Heinzen reading and end-of-chapter questions.

Use the following table to answer Question 1. This table depicts the scores of 83 students on an exam worth 65 points.

  1. Use the information in the table to determine the percentages for each interval. Depending on your rounding

decisions, these may or may not add up to exactly 100% but should be very close.

Table: Grouped Frequency Table

Score Interval / Frequency / Percentages for each Interval
90-100 / 9 / ?
80-89 / 8 / ?
70-79 / 8 / ?
60-69 / 3 / ?
50-59 / 4 / ?
40-49 / 2 / ?
30-39 / 1 / ?
TOTAL / ? / ?

2)______look like bar graphs but typically display scale data.

3)A frequency distribution that is bell-shaped, symmetrical, and unimodal is______.

4)A frequency distribution that has a tail trailing off to the left of the distribution is______.

5)A frequency distribution of ages of residents at a children’s shelter is clustered around 6 with a long tail to the right. This distribution is______.

6)When a constraint prevents a variable from taking on values below a certain point, this is known as a(n)______effect.

7)When graphing a single scale variable you should use which type of graph? ______

8)There are two types of graphs that are best to use when graphing two scale variables. Which two graphs are these? ______and ______

9)When graphing a nominal independent variable and a scale dependent variable, you could use a ______or a ______.

10)A grouped frequency table has the following intervals: 30–39, 40–49, and 50–59.
If converted into a histogram, what would the midpoints be? The process of determining midpoints is best outlined in Example 2.3 of Chapter 2, and illustrated in Ex. 2.4.
30–39:Midpoint Value
40–49:Midpoint Value
50–59:Midpoint Value
11)Do the data in the scatterplot below show a linear relation, non-linear relation, or no relation at all?
Answer
12)Do the data in the scatterplot below show a linear relation, non-linear relation, or no relation at all?
Answer
Part II: SPSS Analysis
Green and Salkind, Lesson 20
·Open the “Lesson 20 Exercise File 1” document (found in the course’s Assignment Instructions folder) in order to complete these exercises.
·Always use the Blackboard files instead of the files on the Green and Salkind website as some files have been modified for the purposes of this course.
·Reminder: For Exercise 1, be sure to paste in the SPSS output and write out the answers for A, B, and C beneath it.
Part II:
Questions 1-4
·Ann wants to describe the demographic characteristics of a sample of 25 individuals who completed a large-scale survey.
·She has demographic data on the participants’:
§Gender (two categories)
§Educational level (four categories)
§Marital status (three categories)
§Community population size (eight categories).
Questions 1a -1c
1)Conduct a frequency analysis on the gender and marital status variables. From the output, identify the following:
a. Percentage of men
b. Mode for marital status
c. Frequency of divorced people in the sample
Answer- Table- Gender:(paste Table in this cell)
Answer- Table- Marital Status:(pasteTable in this cell)
1-a)Percentage of men:Answer
1-b)Mode for marital status (give the name of the group, not the number):Answer
1-c)Frequency of married people in the sample:Answer
Questions 2-4
2)Create a frequency table to summarize the data on the educational level variable.
Answer- Table-Education Level:(paste Table in this cell)
3)Create a bar chart to summarize the data from the community population variable.
Answer- Bar chart -Community population:(paste Bar chartin this cell)
4)Write a Participants section describing the participants in Ann’s sample.
Answer- Participants Section:
Part III: SPSS Data Entry and Analysis
The steps will be the same in Part III as the ones you have been practicing in Part I of the assignment; the only difference is that you are now responsible for creating the data file as well. Remember to do the following:
·Name and define your variables under the “Variable View,” then return to the “Data View” to enter the data; and
·Paste all SPSS output and graphs into your homework file at the appropriate place.
Part III:
Questions 1a-1c
·This question is based on the data in the end-of-chapter Question 2.30 of the Nolan and Heinzen textbook.
·Create a variable called “num_years” in a new SPSS file.
·Enter the data given in #2.30.
oRemember to enter the data into 1 column (variable).
1-a)Run a frequencies analysis that includes descriptive statistics for these scores (central tendency, dispersion, and distribution) and create a frequency table in SPSS for these data.
Answer- Descriptive Statistics Table-Number of Years:
(paste Table in this cell)
Answer- Frequency Table-Number of Years:
(paste Table in this cell)
1-b)Create a histogram for these data.
Answer- Histogram -Number of Years:
(paste Figure in this cell)
1-c)How many schools have an average completion time of 8 years or less? (Each number in the file represents one school.)
An average completion time of 10 years or more?
Answer for 9 years or less =
Answer for 13 years or more =