PSYC 354 Homework 2 Frequency Tables and Graphs

 PSYC 354 Homework 2 Frequency Tables and Graphs

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 All Questions

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

Table: Grouped Frequency Table

Exam score	Frequency
60–62	3
57–59	9
54–56	21
51–53	18
48–50	14
45–47	10
42–44	8
TOTAL	83

2)  When constructing a histogram and labeling the x- and y-axes, the lowest number on each axis should ideally be ……

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

4)  A frequency distribution that has a tail trailing off to the right of the distribution is  

5)  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   

6)  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?

 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?

Part I:

Question 10a- 10e

·    Read the introduction and click on different “subway lines” to see how the interactive graph works.

10-a)     In which of the four boroughs is the median household income highest?  

10-b)     Click on the “A” line. Does the line graph for Manhattan show high or low variability? What does this

level of variability tell us about the household income in this area of Manhattan?

10-c)     Click on line 2. Which borough (not a street) shows the least variability in median household income?

10-d)     On line 2, find the following two subway stops: Park Place (the first of the highest Manhattan stops) and E 180 St. (one of the lowest Bronx stops, located about halfway across the BRX section). What is the difference (calculate) between the median household incomes of the two areas?

10-e)      Click on the “D” line. Which subway stop in Brooklyn seems to be an outlier?

 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 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