MATH 1131 3.0  Fall 2011
Assignment 1
(Due Date: September 28, 2011)
(only hand in the
*
questions)
Question 1
*
:
At the PISA Web site (www.pisa.oecd.org), there are summary statistics for
math scores of 15yearold males and females separately. The mean math scores for males,
the mean math scores for females, and also the difference of the two means are listed in the
Excel file.
a.
Report the 5number summaries for male scores and female scores.
b.
Use a graphical presentation that you have learned in the course to compare per
formance of male and female students.
Based on the graph, do they have similar
performances? Why or why not?
c.
Which countries’ male scores can be considered as “outliers”? Why? Justify it.
d.
Are the variations of the male scores and female scores more or less the same? Why?
Justify it.
e.
Obtain the boxplot for the difference of the two means. Based on the plot, can you
say males scores are, in general, higher than female scores?
Question 2:
The homicide rate per 100000 residents for 18 of the biggest Canadian and
US cites are recorded in the Excel file.
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 Fall '10
 Wong
 Math, Statistics, Standard Deviation, Summary statistics, cumulative relative frequency

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