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Fall 2019
Critical Thinking Assignment 2 (50 points)
DUE DATE: OCTOBER 23
INSTRUCTIONS:
In this second critical thinking assignment, you will use the
data you have already collected
to
perform data analysis in order to answer the following research questions:
1.
Do students who were born outside the USA have a higher mean GPA than students who
were born in in the USA?
2.
Do students who were born outside the USA spend more time on their homework than
students who were born in the USA?
3.
Do students who were born outside the USA have a higher mean age than students who
were born in the USA?
Your data file that you have put together for your first assignment should look like the one
below, with all of the values for each variable inserted. You should have
two files
like this, one
for students who were born
outside the USA
and one for students who were born
inside the
USA.
STUDENT ID
AGE
TOTAL
CRD
HOURS
GPA
HRS SPENT ON SCHOOL WORK
AT HOME
1.
Using these data files, calculate the following and fill in your answers in the tables below:
You will print and turn in the tables below, along with your answers to all of the questions.
GROUP 1: STUDENTS BORN OUTSIDE THE USA
AGE
TOTAL
CRD HRS
GPA
HRS SPENT ON SCHOOL
WORK AT HOME
MEAN
MEDIAN
MODE
STD DEVIATION


VARIANCE
Q1
Q2
Q3
P
90
IQR
LIST ANY
OUTLIERS
GROUP 2: STUDENTS BORN IN THE USA
AGE
TOTAL
CRD HRS
GPA
HRS SPENT ON SCHOOL
WORK AT HOME
MEAN
MEDIAN
MODE
STD DEVIATION
VARIANCE
Q1
Q2
Q3
P
90
IQR
LIST ANY
OUTLIERS
Construct a boxplot for the variable “Age” for both samples.
Construct a boxplot for the variable “GPA” for both samples.
Construct a boxplot for the variable “Hours spent on homework” for both samples.


2.
Using your answers from the tables above, complete the table below to answer the question:
Do students who were born outside the USA have a
higher mean GPA
than students who
were born in the USA?
Students born outside the USA
Students born in the USA
Mean GPA
Median GPA
Standard Deviation
Students who are born outside the USA have a mean GPA of _________, while students
who are born in the USA have a mean GPA of ______.  I believe that students who were
born ___________  the USA have a higher mean GPA because ____________  
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
3.
Using your answers from the tables above, complete the table below to answer the question:
Do students who were born outside the USA
spend more time on their homework
than
students who were born in the USA?
Students born outside the
USA
Students born in the USA
Mean hours spent on
homework
Median hours spent
on homework
Standard Deviation
Students who were born outside the USA spend an average of _________ hours per week
on homework, while students who were born in the USA spend an average of ________
per week on homework.  I believe that students who were born ___________  the USA
spend more time on their homework because
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
 

________________________________________________________________________

________________________________________________________________________

4.

(a) Find the Z-score for a student having a GPA of 3.50 

for students born outside the USA. 

(b) Would it be unusual to randomly select a 

student who was born outside the USA

and 

find that s/he had a GPA of 3.50?  

5.

(a) Find the Z-score for a student having a GPA of 3.50 

for students born in the USA.

(b) Would it be unusual to randomly select a 

student who was born in the USA

and find 

that s/he had a GPA of 3.50?