STAT 401 INTRODUCTION TO BASIC STATISTICAL CONCEPTS
STUDY SET!!
Statistics - ANSWER the science of collecting, organizing, summarizing and analyzing
information to draw conclusions or answer questions
Data - ANSWER any collection of numbers, characters, images or other items that
provide information about something
Population - ANSWER the entire group to be studied
Population Unit - ANSWER person or object that is a member of the population being
studied
Census - ANSWER examination of all members of the population
Sample - ANSWER subset of the population that is being studied
Parameter - ANSWER numerical summary of the population
Statistic - ANSWER numerical summary of data (sample)
Descriptive Statistic - ANSWER consist of organizing and summarizing data; describes
data through numerical summaries, tables and graphs
Statistical Inference - ANSWER branch of statistics dealing with uncertainty issues that
arise in extrapolating to the population the information contained in the sample
, Random sampling - ANSWER the process of using chance to select individuals from a
population to be included in the sample
Convenient sampling - ANSWER does not get a representative sample
Simple random sampling (SRS) - ANSWER A sample of size n from a population of size N
is obtained through simple random sampling if every possible sample of size n has an
equally likely chance of occurring
Stratified sampling - ANSWER A stratified sample is obtained by separating the
population into non-overlapping groups called strata and then obtaining a simple
random sample from each stratum.
Systematic sampling - ANSWER A systematic sample is obtained by selecting every kth
individual from the population.
Sampling variability - ANSWER Differences in the characteristic of interest can still vary
from one sample to another
Frame - ANSWER a list of all the individuals within the population THAT are available to
be sampled
Lurking variable - ANSWER another factor contributing that we do not see
Inherent or intrinsic variability - ANSWER a characteristic of interest can vary from one
member of the population to another
Example of U.S. Census - ANSWER The U.S. conducts one every 10 years to learn the
demographic makeup of the United States
Cost of U.S. Census 2010 - ANSWER In 2010, the cost was approx. $5.4 billion and
STUDY SET!!
Statistics - ANSWER the science of collecting, organizing, summarizing and analyzing
information to draw conclusions or answer questions
Data - ANSWER any collection of numbers, characters, images or other items that
provide information about something
Population - ANSWER the entire group to be studied
Population Unit - ANSWER person or object that is a member of the population being
studied
Census - ANSWER examination of all members of the population
Sample - ANSWER subset of the population that is being studied
Parameter - ANSWER numerical summary of the population
Statistic - ANSWER numerical summary of data (sample)
Descriptive Statistic - ANSWER consist of organizing and summarizing data; describes
data through numerical summaries, tables and graphs
Statistical Inference - ANSWER branch of statistics dealing with uncertainty issues that
arise in extrapolating to the population the information contained in the sample
, Random sampling - ANSWER the process of using chance to select individuals from a
population to be included in the sample
Convenient sampling - ANSWER does not get a representative sample
Simple random sampling (SRS) - ANSWER A sample of size n from a population of size N
is obtained through simple random sampling if every possible sample of size n has an
equally likely chance of occurring
Stratified sampling - ANSWER A stratified sample is obtained by separating the
population into non-overlapping groups called strata and then obtaining a simple
random sample from each stratum.
Systematic sampling - ANSWER A systematic sample is obtained by selecting every kth
individual from the population.
Sampling variability - ANSWER Differences in the characteristic of interest can still vary
from one sample to another
Frame - ANSWER a list of all the individuals within the population THAT are available to
be sampled
Lurking variable - ANSWER another factor contributing that we do not see
Inherent or intrinsic variability - ANSWER a characteristic of interest can vary from one
member of the population to another
Example of U.S. Census - ANSWER The U.S. conducts one every 10 years to learn the
demographic makeup of the United States
Cost of U.S. Census 2010 - ANSWER In 2010, the cost was approx. $5.4 billion and
