PSY340: Statistics for the Social Sciences

Part I: give some datasets and have them make frequency distribution table and some graphs

a) Below are the data from students asked how many hours they had studied the previous weekend:
11,2,0,13,5,7,1,8,12,11,7,8,9,10,4,7,8,6,7,10,7,3,11,18,2,9,7,3,7,8,3,13,9,8,7,7,10,4,15,3,5,6,9,7,10,6
Make a frequency distribution table and a histogram for these data. Describe the shape of the distribution.

Hours Frequency Percent Cumulative Percent 18 1 2 100 17 0 0 98 16 0 0 98 15 1 2 98 14 0 0 96 13 2 4 96 12 1 2 92 11 3 6 90 10 5 10 84 9 4 8 74 8 5 10 66 7 11 22 56 6 4 8 34 5 2 4 26 4 3 6 22 3 4 8 16 2 2 4 8 1 1 2 4 0 1 2 2
this distribution is roughly unimodal and slightly positively skewed.

b) Below are the number of minutes it took each of a group of 10-year-olds to do a series of abstract puzzles:
24,84,36,22,81,39,60,62,38,36,66,38,45,20,20,67,41,87,41,82,35,82,28,80,80,68,40,27,43,80,31,89,83,24
Make a grouped frequency distribution table and a histogram for these data. Describe the shape of the distribution.


Interval (mins.) Frequency Percent Cumulative Percent 80-89 10 29.4 100 70-79 0 0 70.6 60-69 5 14.7 70.6 50-59 0 0 55.9 40-49 5 14.7 55.9 30-39 7 20.6 41.2 20-29 7 20.6 20.6 Note: your frequency distirubtion table and histograms may look different if you use different a different interval size
This distribution is roughly rectangular.

c) Give an example of something having these distributional shapes:
1) bimodal (insert example here),
2) approximately rectangular (number of students in each grade of an elementary school)
3) positively skewed (people's networth in the U.S.)

a) Make histograms (under the GRAPHS menu) of math and verbal sat scores. Describe the shape of the distributions

Under the 'graphs' menu select 'histograms.' Enter the variable msat (or vsat).


b) Make a simple bar graph of average high school math scores (use the 'bars represent other summary function' button) by sex (enter in the category axis)


c) Make a simple bar graph using different columns as data (use summaries of separate variables), with average high school math, science, and english grades

d) Make a clustered bar graph of college gpa (other summary function), with sex (clusters) and major (category)


e) Make a scatterplot of math and verbal sat scores