PSYC 354 Homework 2

Part I: Concepts

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.

2.     A frequency distribution that is bell-shaped, symmetrical, and unimodal is _

3.     A frequency distribution that has a tail trailing off to the right of the distribution is _

4.     A frequency distribution of ages of residents at a senior citizen home is clustered around 83 with a long tail to the left. This distribution is _________.

5.     When a variable cannot take on values above a certain level, this is known as a(n) _______ effect.

 7.     A grouped frequency table has the following intervals: 30–44, 45–59, and 60–74. If converted into a histogram, what would the midpoints be? (e.g. 30+44 divided by 2 is 37, midpoint) 

 8.     Do the data below show a linear relation, non-linear relation, or no relation at all? 

9.     Do the data below show a linear relation, non-linear relation, or no relation at all? 

10.  At this website, you will find an interactive graph concerning New York City’s geography and income. Read the introduction and click on different “subway lines” to see how the interactive graph works. (Note that the abbreviations stand for the four different boroughs: MAN = Manhattan, BRX = Bronx, BRK = Brooklyn, QNS = Queens. Also note that hovering your mouse over the dots on the graph displays the subway stop and the median income of households in that area.)

Part II: SPSS Analysis

1.     Green and Salkind, Lesson 20, Exercises 1–4

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

2. Green and Salkind, Lesson 20, Exercises 5–7

Open the “Lesson 20 Exercise File 2” document (found in the course’s Assignment Instructions folder) in order to complete these exercises.

Part III: SPSS Data Entry and Analysis

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. Remember to enter the data as 1 column (variable).