Car price vs. Student GPA: Is there a correlation?

Report
Group 9
Traci Mecham
Kristina Hight
Jonathan Fisher
Morgaine Abawi
Kiffen Davis
For Salt Lake Community College
students who own a car, is the price for
their car related to their GPA?


Sampling Method:
Simple Random
Strata: Jordan,
Taylorsville and South
City Campuses
◦ 50 samples from each
campus.

Price of car recorded as
price paid when
purchased and current
GPA was used.


Well over half of the
students had cars
in the < $20,000
range
Only a very small
number had cars
costing over
$30,000
As you can see the box plot is skewed heavily to the
right, due to the high number of relatively moderate
priced vehicles in conjunction with a few in the higher
price range.
The mean price of a car was $12,523
while the range was over $50,000

The ranges with the
most students were



3.0-3.24
3.5-3.74
The majority were
over 3.0.
This box plot is skewed to the left due to
infrequency of students with a low GPA
The mean GPA was 3.36, and ranged from 2.0 to 4.0
$16,000.00
60
$14,000.00
50
$12,000.00
40
$10,000.00
$8,000.00
30
$6,000.00
20
$4,000.00
10
$2,000.00
$0.00
0
2.25
•
•
•
2.5
2.75
3
3.25
3.5
3.75
The bar series represents the Avg. Car Price of students with the specified GPA
The line series represents the number of samples collected for the GPA
The error bars represents the standard deviation of Car Prices across all sample GPAs
4
Car Price - GPA
$60,000.00
$50,000.00
$40,000.00
Car Price
$30,000.00
Linear (Car Price)
$20,000.00
y = -358.3x + 13032
$10,000.00
$2
•
•
2.5
3
3.5
4
4.5
Each plot point on the graph represents a survey sample
Samples are distributed by the Car Price on the Y-axis and the GPA on the X-axis
RESULTS
Our study was unable to find any correlation
between the GPA and price of vehicle for Salt Lake
City Community College students and concludes
that the two variables appear to be unrelated

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