It means to observe or conclude some thing about your experiment.
Initial observation is the first observation you make. For example, you notice something and wonder why it happens or you see something and wonder what causes it. You want to know how or why something works. It lead to gathering as much information as possible concerning it.
A conclusion about an observation is referred to as an inference or infer in short form. This is a method which allows you to reach conclusions based on observations.
Quantitative observation means that your description of what you observedincludes a definite number that you measured.For example:"I saw a really big guy." is not a quantitative observation."I saw a guy who is 8 feet tall." is a quantitative observation.
i not understand and what mean contributory? my father death.
a theory which is made by observation