math 225 midterm Questions with Verified
Correct Answers
experimental study
the researchers attempt to control one or more aspects of the individuals in the sample. The
individuals in the sample will be randomly divided into multiple groups or cases
Observational Study
no attempt is made to control any aspect of the individuals in the sample. The sample is
chosen using an appropriate process, and the variables of interest are recorded for each
individual
Data
Facts, figures, and other evidence gathered through observations.
Statistics
Collection of methods for planning experiments, obtaining data, organizing, summarizing,
presenting, analyzing, interpreting, and drawing conclusions based on data.
Population
collection of all outcomes, responses, measurements, or counts that are of interest
Sample
a subset of the population
Statistic
a numerical measurement describing some characteristic of a sample
Parameter
, numerical summary of a population
Descriptive Statistic
organizes, summarizes, and communicates a group of numerical observations
inferential statistics
involves using sample data to draw conclusions about a population
Qualitative data
Information describing color, odor, shape, or some other physical characteristic
Quantitative Data
numerical data
Nominal
Qualitative only
uses names, labels, or qualities
No MATH computations can be made at this level
Ordinal
Qualitative or quantitative data
Data can be arranged in order, or ranked
Differences between data entries is not meaningful
Interval
Quantitative ONLY
can be ordered
Correct Answers
experimental study
the researchers attempt to control one or more aspects of the individuals in the sample. The
individuals in the sample will be randomly divided into multiple groups or cases
Observational Study
no attempt is made to control any aspect of the individuals in the sample. The sample is
chosen using an appropriate process, and the variables of interest are recorded for each
individual
Data
Facts, figures, and other evidence gathered through observations.
Statistics
Collection of methods for planning experiments, obtaining data, organizing, summarizing,
presenting, analyzing, interpreting, and drawing conclusions based on data.
Population
collection of all outcomes, responses, measurements, or counts that are of interest
Sample
a subset of the population
Statistic
a numerical measurement describing some characteristic of a sample
Parameter
, numerical summary of a population
Descriptive Statistic
organizes, summarizes, and communicates a group of numerical observations
inferential statistics
involves using sample data to draw conclusions about a population
Qualitative data
Information describing color, odor, shape, or some other physical characteristic
Quantitative Data
numerical data
Nominal
Qualitative only
uses names, labels, or qualities
No MATH computations can be made at this level
Ordinal
Qualitative or quantitative data
Data can be arranged in order, or ranked
Differences between data entries is not meaningful
Interval
Quantitative ONLY
can be ordered
