QMET 251 Exam 1 – Study Guide, Practice Questions & Quantitative Methods
Review
Statistics - correct answer ✔✔the set of knowledge and skills used to collect, organize, analyze
and interpret data to assist in making more effective decisions
Types of Statistics - correct answer ✔✔1. Descriptive Statistics--Visual Analytics & Numerical
2. Inferential Statistics
Descriptive Statistics - correct answer ✔✔methods of organizing, summarizing and presenting
data in an informative way; visual and numerical
Visual Analytics - correct answer ✔✔1. Qualitative--bar graphs, pie charts, frequency table
2. Quantitative--frequency distribution table
Inferential Statistics - correct answer ✔✔the methods used to estimate a property of a
population on the basis of a sample
Population - correct answer ✔✔the entire set of individuals or objects of interest or the
measurements obtained from all individuals or objects of interest
Sample - correct answer ✔✔a portion, or part, of the population of interest
Why take samples? - correct answer ✔✔1. Prohibitive cost of census
2. Destruction of item being studied may be required
3. Not possible to test or inspect all members of a population being studied
, Types of Variables - correct answer ✔✔1. Qualitative
2. Quantitative
Qualitative (Attribute) Variable (know how to create tables) - correct answer ✔✔the
characteristics being studied is nonnumeric; data shown in Frequency table, relative frequency
table, & bar chart
Quantitative Variable - correct answer ✔✔-information is reported numerically
1. Discrete - only assume certain values and there are usually "gaps" between values (whole
numbers)
2. Continuous - assume any value within a specified range;
shown with frequency distribution table (including relative frequency & cumulative frequency),
& histogram
Four Levels of Measurement - correct answer ✔✔1. Nominal
2. Ordinal
3. Interval
4. Ratio
Nominal-Level Data - correct answer ✔✔data that is observations of a qualitative variable that
is classified into categories and not arranged in any particular order;
ex. eye color, gender
Ordinal-Level Data - correct answer ✔✔data classifications are represented by sets of labels or
names (high, medium, low) that have relative values; the data can be ranked or ordered;
differences between data values cannot be determined or are meaningless
Interval-Level Data - correct answer ✔✔data classification ordered according to the amount of
the characteristic they possess; equal differences in characteristic represented by equal
Review
Statistics - correct answer ✔✔the set of knowledge and skills used to collect, organize, analyze
and interpret data to assist in making more effective decisions
Types of Statistics - correct answer ✔✔1. Descriptive Statistics--Visual Analytics & Numerical
2. Inferential Statistics
Descriptive Statistics - correct answer ✔✔methods of organizing, summarizing and presenting
data in an informative way; visual and numerical
Visual Analytics - correct answer ✔✔1. Qualitative--bar graphs, pie charts, frequency table
2. Quantitative--frequency distribution table
Inferential Statistics - correct answer ✔✔the methods used to estimate a property of a
population on the basis of a sample
Population - correct answer ✔✔the entire set of individuals or objects of interest or the
measurements obtained from all individuals or objects of interest
Sample - correct answer ✔✔a portion, or part, of the population of interest
Why take samples? - correct answer ✔✔1. Prohibitive cost of census
2. Destruction of item being studied may be required
3. Not possible to test or inspect all members of a population being studied
, Types of Variables - correct answer ✔✔1. Qualitative
2. Quantitative
Qualitative (Attribute) Variable (know how to create tables) - correct answer ✔✔the
characteristics being studied is nonnumeric; data shown in Frequency table, relative frequency
table, & bar chart
Quantitative Variable - correct answer ✔✔-information is reported numerically
1. Discrete - only assume certain values and there are usually "gaps" between values (whole
numbers)
2. Continuous - assume any value within a specified range;
shown with frequency distribution table (including relative frequency & cumulative frequency),
& histogram
Four Levels of Measurement - correct answer ✔✔1. Nominal
2. Ordinal
3. Interval
4. Ratio
Nominal-Level Data - correct answer ✔✔data that is observations of a qualitative variable that
is classified into categories and not arranged in any particular order;
ex. eye color, gender
Ordinal-Level Data - correct answer ✔✔data classifications are represented by sets of labels or
names (high, medium, low) that have relative values; the data can be ranked or ordered;
differences between data values cannot be determined or are meaningless
Interval-Level Data - correct answer ✔✔data classification ordered according to the amount of
the characteristic they possess; equal differences in characteristic represented by equal
