CMN 3102 - Quantitative Methods Midterm Exam
With Complete Solution
3 Types of Variables - ANSWER 1. Nominal
2. Ordinal
3. Interval/Ratio
2 Types of Hypothesis Testing - ANSWER 1. Dependent
2. Independent
Nominal Variables - ANSWER A level of measurement describing a variable
that has values that cannot be ranked in contrast to other types of variables
ex. Countries (cannot rank countries because no country is better than
another)
ex Names (no name is better than another)
Ordinal Variables - ANSWER A variable with values we can rank-order along
some dimension but cannot find the average value (the mean)
ex. Spicy scale (mild, medium, hot)
ex. Level of satisfaction (extremely unsatisfied, unsatisfied, neither satisfied
nor unsatisfied, satisfied, very satisfied)
, Interval/Ratio Variables - ANSWER A level of measurement describing a
variable whose values are rank-ordered and have equal distances between
adjacent values
**Can have a value of 0 in ranking
ex. Age (years)
ex. Income (dollars)
Name of the First Digital Computer - ANSWER Abacus
John Atanasoff - ANSWER - Physics Professor
-Created the Atanasoff-Berry computer (ABC) from 1937-42
-There was no patent for this computer so a legal battle between Atanasoff
and Eckert and Mauchly began. Atanasoff won the case
Measurement/Construct Validity - ANSWER Involves the question "Are you
measuring what you want to measure"?
- Is a survey question about the prejudice to other groups a valid measure of
prejudice?
With Complete Solution
3 Types of Variables - ANSWER 1. Nominal
2. Ordinal
3. Interval/Ratio
2 Types of Hypothesis Testing - ANSWER 1. Dependent
2. Independent
Nominal Variables - ANSWER A level of measurement describing a variable
that has values that cannot be ranked in contrast to other types of variables
ex. Countries (cannot rank countries because no country is better than
another)
ex Names (no name is better than another)
Ordinal Variables - ANSWER A variable with values we can rank-order along
some dimension but cannot find the average value (the mean)
ex. Spicy scale (mild, medium, hot)
ex. Level of satisfaction (extremely unsatisfied, unsatisfied, neither satisfied
nor unsatisfied, satisfied, very satisfied)
, Interval/Ratio Variables - ANSWER A level of measurement describing a
variable whose values are rank-ordered and have equal distances between
adjacent values
**Can have a value of 0 in ranking
ex. Age (years)
ex. Income (dollars)
Name of the First Digital Computer - ANSWER Abacus
John Atanasoff - ANSWER - Physics Professor
-Created the Atanasoff-Berry computer (ABC) from 1937-42
-There was no patent for this computer so a legal battle between Atanasoff
and Eckert and Mauchly began. Atanasoff won the case
Measurement/Construct Validity - ANSWER Involves the question "Are you
measuring what you want to measure"?
- Is a survey question about the prejudice to other groups a valid measure of
prejudice?
