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Test Bank for Statistics Informed Decisions Using Data 6th Edition By Michael Sullivan
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Test Bank for Statistics Informed Decisions Using Data 6th Edition By Michael Sullivan
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Test Bank for Statistics Informed Decisions Using Data6th Edition By Michael Sullivan
Statistics - ANSWER the science of obtaining, organizing, summarizing and
analyzing information to draw conclusions or answer questions
Data - ANSWER information that can be analyzed or used in an effort to gain
knowledge or make decisions.
Datum - ANSWER a single most elementary piece of information
Examples where we see statistics and data analysis used in daily life - ANSWER •
Stock Market
• Political Polls
• Sports
• Scientific Journals and Articles
Where does data come from? - ANSWER It is obtained by collecting samples of
items of what we want to study, or by direct observation of some phenomenon.
Unit - ANSWER A person (or object) that is a member of the population being
studied.
Population - ANSWER The entire collection of units (or individuals) that we want to
study.
Sample - ANSWER A subset of the population that we collect randomly
Representative Sample - ANSWER A sample that closely resembles the target
population (Population to be studied).
Parameter - ANSWER A numerical summary of a population. (Example: the
percentage of all students on your campus who have a job is 84.9%)
Statistic - ANSWER A numerical summary of a sample. (Example: a sample of 250
students is obtained, and from this sample we find that 86.3% have a job)
Descriptive Statistics - ANSWER Methods for organizing and summarizing
information data from a sample. They include the charts, tables, graphs, and other
descriptive characteristics of the data such as the mean, standard deviation, and
correlation.
Inferential Statistics - ANSWER Study samples and then make generalizations about
the populations from which they were selected. They are used to draw conclusions
about population parameters.
The Process of Statistics in Research - ANSWER 1. Identify the research objective
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