What is the Hypothesis? Definition of Hypothesis. Example of Hypothesis: The hypothesis usually involves proposing a possible relationship between two variables. 1. The independent variable (what the researcher changes) and 2. The dependent variable (what the researcher measure).
In research, there is a convention that the hypothesis is written in two forms:
1. Null hypothesis
2. Alternative hypothesis.
An
alternative hypothesis is also called an experimental hypothesis when the
method of investigation is an experiment.
Definition of Hypothesis:
Hypothesis testing is a branch of statistics in which, using data from a sample, an inference is made about a population parameter or a population probability distribution.
Type of Hypothesis:
Simple Hypothesis: What is a Simple Hypothesis?
The simple hypothesis is a prediction of the relationship
between two variables. 1. The independent variables and 2. the dependent
variables. Example: Drinking sugary drinks daily leads to obesity.
Complex Hypothesis: What is Complex Hypothesis?
The complex hypothesis examines the relationship between two
or more independent variables and two or more dependent variables. Example:
Overweight adults who value longevity and seek happiness are more likely than
other adults to loos their excess weight and feel a more regular sense of joy.
Null Hypothesis: What is the null Hypothesis?
The null hypothesis is denoted as H0. A null Hypothesis
exists when a researcher believes there is no relationship between the two
variables, or there is a lack of information to state a scientific hypothesis.
This is something to attempt to disprove or discredit. For example, there is no
significant change in my health during the times when I drink green tea only or
root beer only.
This is where the alternative hypothesis (H1) comes in to picture. In an attempt to disprove a null hypothesis, researchers will seek to discover an alternative hypothesis. Example: My health improves during the times when I drink green tea only, as opposed to root beer only.
The logical Hypothesis: What is a logical Hypothesis?
The logical hypothesis is a proposed explanation possessing
limited evidence. Generally, you want to turn a logical hypothesis into an
empirical hypothesis.
An empirical hypothesis: What is an empirical Hypothesis?
An empirical hypothesis or working hypothesis comes to life
when a theory is put to the test, using observation and experiment. It's no
longer just an idea or notion. It's actually going through some trial and
error, and perhaps changing around those independent variables. Examples: Roses
watered with liquid vitamin B grow faster than roses watered with liquid
vitamin E. Here, trial and error is leading to a series of findings.
The Statistical hypothesis: What is Statistical Hypothesis?
The statistical hypothesis is an examination of a portion of
a population. Example: If you wanted to conduct a study on the life expectancy
of residents of savannah. This is not practical. Therefore, you would conduct
your research using a statistical hypothesis, or sample of the savanna
population.
