What is the average number of
hours girls in Badin spend on
Facebook in a week?
Project Type B: Population Average
Our population of interest was girls in Badin Hall
The population average we wanted to calculate was the
average number of hours girls in Badin spend on
Facebook during the week
This average represents quantitative data
Finding our Data
We found our data by sending out a survey through
email to the entire dorm asking the average number of
hours one spends on Facebook during the week
The girls emailed back their responses
The population was a random sample, because the girls
that were asked are different ages, from different
places, and have different interests, therefore making
the selection random.
We anticipated measurement error, because the survey was sent
electronically leaving room for technical mishaps ect.
We also anticipated non- response bias, because people may not
have responded to the email and disregarded it.
We had no selection bias because we asked all of the girls in
To avoid biases, we created a single clear question that sought to
eliminate confusion. The phrasing of the question also excluded
any leading questions. Also, our survey was quick and simple to
The selection of Badin girls as our population of interest, was
one based on the diversity of the girl’s ages, background and
interest, eliminating possible biases.
We expected the data to fall between 2 and 3 hours a
week that was spent on Facebook.
We expected these values, because of Notre Dame’s
academically driven nature. Students of Notre Dame,
typically do not have spare hours to spend on a social
Estimated Population Average
We were 80 percent confident that the average number
of hours Badin girls spent on Facebook a week was
between 3.54 hours and 5.30 hours.
Mean= 4.422 s= 4.5936
n= 45 z α/2= 1.282
When we plugged these values into the formula we got the
number of hours; between 3.54 and 5.30.
0 2.5 5
0 3 5
0 3 6
1 3 7
1 3 7
1 3 8
1 3 8
1 3 10
1 3 12
2 3.5 14
2 3.5 14
2 4 25
2.5 4.5 Average 4.22 (Captain Data)
Average Number of Hours A Badin Girl
spends on Facebook a week
Biases that we expected did not end up being a problem
because enough people responded, and we were fairly
confident that they were honest on the number of time
they spent on Facebook per week.
Our results were actually a bit higher than what we
expected. We expected that the average number of
hours would have been between 2 and 3 hours when
actually the real number was 4.422.
We were surprised with the value of 4 hours per week,
for it is a high number.
We had difficulties trying to figure out how we would
get the question out to every girl in Badin, but we
figured out how to put it on the master Badin email.
We thought we were thorough in our approach and
presentation with this project, however maybe in the
future, if we were to repeat this again, we would
incorporate all female dorms at Notre Dame, to get a
Standard Deviation- 4.5936
Potential Outliers- 10, 12, 14, 25