Testing the Difference Between Two Means(large samples)

Friday, August 30, 2012, we've started to discuss about the topic "Testing the difference between two means with large sample size.  Let me share to you the some of the important ideas regarding this topic.

TESTING THE DIFFERENCE BETWEEN TO MEANS (LARGE SAMPLE SIZE)

FORMULA 

There are situations where a researcher wants to determine whether there is a difference in the average age of maritime students who enrolled in a maritime program at a community college and those who enrolled at a university. In this matter the researcher is not interested in the average age of maritime students who are just beginning their course; instead he is interested in comparing the means of the two groups.

Assumptions for the test to determine the difference between the two means

1.The sample must be independent of each other.

2.The population from which the samples were obtained mus be normally distributed.

3. Standard deviation of the variable must be known or the sample size must be greater than or equal to 30.

Steps

1. State the hypothesis

2. Find the critical values 

3. Decision

4. Summary of results 

BY: JOREY MARK MILLAMENA

AUGUST 30,2012