37631417
Description
Mind Map by Selena Barcelo, updated more than 1 year ago
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Created by Selena Barcelo
over 3 years ago
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Stages of statistical investigation
- PLAN
- Draw up a plan or investigation project setting out the aspects to be
addressed, statistical methods and possible solutions when
problems are encountered. This stage includes.
- Investigation objective
- Defines what is the fact or phenomenon to be
studied, it must be clear and concise since it's
the central point of the investigation.
- It's necessary to determine whether the
phenomenon can be studied and
whether it can be recorded statistically.
- It's necessary to determine whether the
phenomenon can be studied and
whether it can be recorded statistically.
- Determine quantitative and
qualitative aspects.
- The investigation object must be delimited,
analyzing if it's necessary observing all the
characteristics.
- Defines what is the fact or phenomenon to be
studied, it must be clear and concise since it's
the central point of the investigation.
- Investigation objective
- Draw up a plan or investigation project setting out the aspects to be
addressed, statistical methods and possible solutions when
problems are encountered. This stage includes.
- Data collection
- There are two possible sources of information.
- Direct: Data is obtained from the direct
observation of an event, that is, the
information is obtained at the exact location
where the event takes place.
- Indirect: The data comes from another
event, different from the one it's looking
for, and then we deduce the value we want
to know.
- At the same time, sources of information can be classified in
- Primary source: Data is obtained directly from the
investigation, so in this case surveys are used.
- Surveys are questionnaires that allow the answers of the event being
investigated to be recorded.
- The interview is also another means of data collection, allowing a
greater number of answers to be obtained, however, it represents a
high cost, and also requires time to be carried out.
- Surveys are questionnaires that allow the answers of the event being
investigated to be recorded.
- Secondary source: The data is obtained from institutions that have
previously published the information.
- Primary source: Data is obtained directly from the
investigation, so in this case surveys are used.
- Direct: Data is obtained from the direct
observation of an event, that is, the
information is obtained at the exact location
where the event takes place.
- There are two possible sources of information.
- Organization of data
- The previously collected data must be processed, it can
be manual, mechanical or computerized, depending on
- Number and questions on the form.
- Time and resources available.
- Programs such as Microstat, SPSS, Minitab and others are used to process data and
apply statistical measures.
- Number and questions on the form.
- From the information which is has been previously recorded, a database is
generated then, lists are obtained, which are subsequently reviewed to
detect any inconsistencies in the previous stages.
- The previously collected data must be processed, it can
be manual, mechanical or computerized, depending on
- Analysis and presentation of data
- For this stage, distributions and frequency tables are made, systematizing the
information that will later be represented in statistical graphs.
- Such as histogram, bar chart, stem-and-leaf plot, pie chart, among others.
- Such as histogram, bar chart, stem-and-leaf plot, pie chart, among others.
- At this stage, measures are applied that allow a better understanding of
the data obtained and therefore set up conclusions.
- Measures such as the statistics that are applied to the
characteristics of the units that make up the sample.
- or the statistical parameters that
apply to the characteristics of the
population.
- or the statistical parameters that
apply to the characteristics of the
population.
- Measures such as the statistics that are applied to the
characteristics of the units that make up the sample.
- For this stage, distributions and frequency tables are made, systematizing the
information that will later be represented in statistical graphs.
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