LECTURE 3 Data Presentation.pdf - LECTURE 3 Data Presentation S P 11 0 S TAT I S T I C S F O R P S Y C H O L O G Y OUTLINE Frequency table Histogram Bar

# LECTURE 3 Data Presentation.pdf - LECTURE 3 Data...

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LECTURE 3 Data Presentation SP110 STATISTICS FOR PSYCHOLOGY
OUTLINE Frequency table Histogram Bar Graph
FREQUENCY TABLE Provide a listing of individuals having each of the different values for a particular variable. In other word, it is a systematic listing of the number of scores (the frequency) of each value in the group studied. Example: Stress ratings of 30 students: 8,7,4,10,8,6,8,9,9,7,3,7,6,5,0,9,10,7,7,3,6,7,5,2,1,6,7,10,8,8
STEPS FOR MAKING A FREQUENCY TABLE Step1 : Make a list down the page of each possible value, from lowest to highest Step 2 : Go one by one through the scores, making a mark for each next to its value on the list Step 3 : Make a table showing how many times each value on the list is used Step 4 : Figure the percentage of scores for each value
Making a frequency table for the stress ratings scores. (Data based on Aron, Paris, and Aron, 1995.)
A FREQUENCY TABLE
USES OF FREQUENCY TABLES Describes the data Makes the pattern of the data clear Shows how many scores there were for each value on the scale
Grouped Frequency Table A frequency table that uses intervals A grouped frequency table groups the frequencies of adjacent values into intervals. A grouped frequency table can make information even more directly understandable than an ordinary frequency table can. Of course, the greater understandability of a grouped frequency table is at a cost. You lose some information: the details of the breakdown of frequencies in each interval.
Frequency Tables for Nominal Variables

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