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Transcript of Data Analysis
Data analysis is performed using the data matrix which is stored in a file
Procedure to analyze data
Procedures to analyze data
Data analysis is performed by computer.
- Substantial amount of information / data
-Computer system to file and analyze data
The way we have formulated the hypothesis
Measure the level of the variables
The researcher's interest
Data analysis depends on three factors
The main analysis
-Descriptive statistics for the variables
-Reasons and Rates
Descriptive statistics for each variable
Describes the data, values or scores
for each variables using a
a determined number of people.
It is an ordered set of scores in their respective categories. It can be in the form of graphs.
Measures of central tendency
Points in a distribution or core
values that help us to locate within
the measurement range
It is the category or score that
occurs most frequently. It is
used with any measurement.
It is the value that divides the distribution in half. It reflects the intermediate position of the distribution.
24 31 35 35
43 45 50 57
It is the sum of all values divided by the number of cases.
it is the difference between the highest score and the lowest score
formula XM - Xm
17 18 20 20 24 28 28 30 33
It is the average of the deviation of the scores respect to the mean.
Standard deviation is squared
It is used to compare the pre-test
score with another score on a post-test
Z = X - X
It is based on sampling and
averaging for research
It is a set of values that
has been calculated
for all the
Level of significance
The research has a 95% chance of being safe according to the sampling done
It can be used
to test hypothesis
Make decisions regarding the analysis to be performed
Running the computer program
The main purpose of the researcher is to describe data of each variables and compare between them.
Measures of variability
Values in a distribution