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Statistics Project

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by

David F.

on 23 July 2013

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Transcript of Statistics Project

Project
As presented by:
Let's get
started,
shall we?
Statistics
Topic
YeonSoo Cho
Dong Chan Yang
Richelle Ledesma
David Vallejillo
David Fang

Social media is becoming a revolutionizing and unavoidable aspect of our daily lives. Founded in 2004, "Facebook" has become one of the most popular social networking services to date. As a feature whose initial purpose was to create an online environment for Harvard students to gather on the web, Facebook now hosts approximately 1.11 billion users. Of those 1.11 billion users, approximately 665 million are active each day.
Social
Media
Ha
Has
Has
Grown
HUGE
f
In 2012, NBC News posted an article stating that on average, a person spends 13 minutes on Facebook.

We
claim
that the average time spent on Facebook is not 13 minutes.
Through the application of statistics, we will conduct a hypothesis test to test our claim.
We believe otherwise...
HYPOTHESIS TEST
Ho: µ = 13 minutes
Ha: µ ≠ 13 minutes
Claim:
The average amount of time spent on Facebook is not 13 minutes.
.
= 36.667
s = 28.019
n = 30
30
28.019
36.667 - 13
4.6264
(degrees of freedom = n - 1 = 29)
.
= 0.01, the critical values are ± 2.704.]
[At a confidence level of 99% with

0.005
0.005
2.704
- 2.704
4.624
In addition, the 'p' value in this situation is approximately 0.0007 which is well below the significance level of 0.01
Decision:
Reject the null hypothesis (Ho)
Conclusion:
There is sufficient evidence to conclude that the average amount of minutes spent on Facebook is not 13 minutes.
Works Cited
Nicholas, Carlson. "At Last -- The Full Story Of How Facebook Was Founded
http://www.businessinsider.com/how-facebook-was-founded-2010-3?op


Craig, Smith. "By the Numbers : Facebook Stats." Expanded Ramblings
. N.p., 23 Jun 2013. Web. 22 Jul 2013. <http://expandedramblings.com/index.php/17-amazing-facebook-stats/>.
Helen A.S., Popkin. "We Spent 230,060 Years on Social Media in One Month." CNBC
. N.p., n.d. Web. 22 Jul 2013. <http://www.cnbc.com/id/100275798>.
(Helen A.S.)
FBI - Facebook Investigators
Full transcript