Caren Anderson
Written Report
Hours of Work vs. Credit Hours at School
The purpose of this study is to find out if the hours worked at a job are related to the amount of
credit hours taken at school. To perform this study we as a group collected our own data which consist
of 25 random surveys. This was only conducted on students that attend salt lake community college.
There was no standard for choosing who to give the survey to, I just simply asked classmates and
random people around campus. This was done over a one week so we could get as many random
samples as possible and not just get students from one class, or a certain time of the day. This would
help insure to not have any bias.
1) See attached worksheet
2) The statistics for my first quantitative variable (hours) are:
Mean: 28.4
Standard Deviation: 13.3
Five number summary: Min: 0, Q1: 19, Med: 30, Q3: 40, Max: 70
Range: 70
Mode: 40
Outliers: 70
3) Histogram for Hours:
Hours at Work
40
35
Frequency
30
25
20
15
10
5
0
5
10
15
20
4) Box Plot for hours at work:
25
30
35
40
45
50
55
60
65
70
Box Plot for Hours Worked
0
10
20
30
40
50
60
70
5) Statistics for second quantitative variable (credit hours):
Mean: 10.18
Standard Deviation: 3.83
Five number summary: Min: 3, Q1: 7, Med: 11, Q3: 13, Max: 18
Range: 15
Mode: 12
Outliers: none
6) Histogram for Credit hours:
Credit Hours
70
60
Frequency
50
40
30
20
10
0
5
10
15
Hours
20
7) Box plot for credit hours:
Box Plot for Credit Hours
0
5
10
15
20
8) R=.4062 and the equation for the line of regression is: y=-.1169811834x+13.51517127
9) Scatter plot with line of regression:
Scatter Plot w/ Line of regreesion
20
18
Credit Hours at School
16
14
12
10
8
6
4
2
0
0
10
20
30
40
50
Hours worked
60
70
80
Difficulties/Surprises Encountered:
The one thing that I was surprised about is how many students work while going to school. I
think sometimes you tend to think you’re the only one carrying a monstrous load with work and school
but looks like we are all in the same boat. The difficulties I encountered were just getting all of my data
into excel and constructing correct graphs. Oh how I do not like excel at this point but it was actually
very informative and I think I could make any graph in excel at this point. I was also surprised that it took
me so long to get this project done and how long it did take to make the graphs I constructed.
Analysis:
The correlation between the two variables turned out to be on the weak side. I was actually
surprised about how weak it was. I originally thought it would correlate a little bit closer to credit hours
but ended up that many students do work full time or more while taking on credit hours. I think the
amount of surveys we did does give a pretty accurate look at whether or not credit hours and job hours
correlate and I have found that there is not much correlation.