Test Using Contingency Tables

When data can be tabulated in the table from in terms of frewuencies, several hypothesis can be tested by using the chi-square test. Two such tests are the independence of variables test and the homogenety of proportions test.

Test for Independence

·         The test of independence is used to determine whether 2 variables are independent of or related to each other when a single sample is selected.

Steps:

·      1.   State the hypotheses

·      2.  Find the degree of freedom

·     3.   Find the expected value

·     4.   Find the test value

·    5.     Find the critical value

·    6.     Make a decision

·     7.   Summarize

Test for homogenety of proportions

·         It is used ti determine whether the proportions for variables are equal when several samples are selected from different populations.

Steps:

·        1.  State the hypotheses

·         2. Find the critical value

·      3.   Find the test value

·       4.   Make a decision

·       5.   Summarize

C.Ordoyo

Majority of establishments is engaged in Water collection, treatment and supply

           The 2010 Annual Survey of Philippine Business and Industry (ASPBI) covered a total of 255 Water supply; Sewerage, Waste Management and Remediation Activities establishments with total employment of 20 and over.
            Among industries, water collection, treatment and supply recorded the highest number of establishments at 232 or 91.0 percent of the total. Waste collection followed a far second with 11 establishments (4.3%). Waste treatment and disposal ranked third with 7 establishments (2.7%) while materials recovery had the lowest number with 5 establishments (2.0%). Figure 1 illustrates the percentage distribution of Water Supply; Sewerage, Waste Management and Remediation Activities establishments by industry group in 2010.

           At the regional level, Central Luzon accounted for the highest number of establishments at 52 or 20.4 percent of the total. This was followed by CALABARZON with 45 establishments (17.6%) and Western Visayas with 20 establishments or 7.8 percent.


 J.Santillan

Statistical Facts About

Google+

                   It is expected that Google’s new social network Google+ will hit 400 million users by the end of 2012. It needs to be kept in mind that Google+ is more about being “core” to Google’s social web strategy as it aims to embed social signals into its whole web and search strategy as it aims to continue to be relevant in an increasingly social and mobile web.

Google makes it mandatory to join Google+ when you register for a Gmail account which really amounts to it being a forced membership. This non organic strategy means that its engagement levels are extremely low at 3 minutes per month compared to Facebook at 405 minutes, in fact they are less than MySpace.

It must be also kept in mind that Google+ is the glue that connects Google’s other social and web properties such as YouTube, Android and of course search.

Some Google+ Facts and Figures

• It was launched on June 28, 2011
• Google+ reached 10 million users by July 14, 2011
• 67% of Google+ users are male
• Google “+1″ button is served more than 5 billion times daily
• It is gaining 625,000 users per day
• In less than one day the Google+ iPhone app became the most popular free application in the Apple App store

J.Santillan

Correlation and Regression

Relationship

1.Simple

-maybe positive

-maybe negative

2.Multiple

Regression- making prediction

*The more stronger the regression the more accurate.

Scatter plot

(x) Independent variable- being controlled

(y) Dependent variable- affected by other variable

J.Santillan

YouTube

Communication and engagement is much more than talking or writing and the popularity of  YouTube is evidence of that. The availability of cost effective high speed internet access is making it easy for people to express themselves via video. Brands have seized on its power to be a viral media that augments traditional advertising media such as TV. YouTube’s advantage is it is always available and searchable. (it is the worlds second largest search engine after Google.

This capability has been displayed by the success of the Old Spice  marketing campaign among many others.

Some facts and figures:

• 3rd most visited website according to Alexa
• 2 billion views per day
• It handles 10% of the internet’s traffic
• Average YouTube user spends 900 seconds per day
• 44% of YouTube’s users are aged between 12 and 34
• Over 829,000 videos are uploaded every day
• Average video duration is 2 minutes 46 seconds

J.Santillan

FACEBOOK STATISTICS

With over 500 million users, Facebook is now used by 1 in every 13 people on earth, with over 250 million of them (over 50%) who log in every day. The average user still has about 130 friends, but that should expand in 2011.

48% of 18-34 year old check Facebook when they wake up, with 28% doing so before even getting out of bed. The 35+ demographic is growing rapidly, now with over 30% of the entire Facebook user base. The core 18-24 year old segment is now growing the fastest at 74% year on year. Almost 72% of all US internet users are on now Facebook, while 70% of the entire user base is located outside of the US.

Over 700 Billion minutes a month are spent on Facebook, 20 million applications are installed per day and over 250 million people interact with Facebook from outside the official website on a monthly basis, across 2 million websites. Over 200 million people access Facebook via their mobile phone. 48% of young people said they now get their news through Facebook. Meanwhile, in just 20 minutes on Facebook over 1 million links are shared, 2 million friend requests are accepted and almost 3 million messages are sent.

 G.K. Elio

STATISTICAL FACTS 

40% of American adults believe in the theory of evolution.

A survey, published in The New York Times, states that 47% of dog owners in America sleep with their dogs.

According to the Gallup poll, in 2009, 77% of Americans claim Christianity as their religion (down from 91% in 1948).

The age with the highest number of children in the foster system is 16 (42,272 out of the 510,000 are 16-year olds).

The top 4 types of child maltreatment in 2007 were the following: 59.0 percent were neglected, 10.8 percent were physically abused, 7.6 percent were sexually abused, and 4.2 percent were psychologically abused.

According to Centers for Disease Control and Prevention, in 2007, there were 35,962 diagnosed with AIDS. This brings the total number of AIDS diagnoses in the US and the district of Colombia to 1,018,428.

National Institute on Alcohol Abuse and Alcoholism (NIAAA) estimated the cost for alcohol abuse in the United States in 1998 to be $184,636 millions (the cost includes healthcare and prevention treatments, loss of productivity and earnings, crime and crashes).




G.K. Elio