psych 354 Homework 2 fall 2015

Part I: Concepts

All Questions

These questions are based on the Nolan and Heinzen reading and end-of-chapter questions.

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

?

?

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:(paste Table 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.

o Remember 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 8 years or less =

Answer for 10 years or more =