Page | 1
Psych 3402 Exam 1 Seaberg Questions
with Detailed Verified Answers
Difference between sample and population
⼀Answer:- ~Population: is every individual that the research pertains to.
(mean=μ)
~Sample: selection form the population that was tested (mean=xbar)
Experimental Method
⼀Answer:- Only methodology that can demonstrate cause and effect:
~ multiply groups
~Group make-up is identical
~One group is unchanged, the other group is manipulated
~Independent Variable
~Dependent Variable
~Cofounding Variable
What is a discrete variable? Continuous?
, Page | 2
⼀Answer:- Discrete: Hard boundaries between groups
Continuous: range, spectrum, degrees can be redefined as discrete, but
info can be lost
~discrete however can not turn continuous.
Four types of scales? Examples
⼀Answer:- ~Nominal
~Ordinal
~Interval
~Ratio
Nominal Scale
⼀Answer:- a scale in which objects or individuals are assigned to
categories that have no numerical properties
e.g. Data is gender: Male or female
ordinal scale
, Page | 3
⼀Answer:- a scale of measurement in which the measurement categories
form a rank order along a continuum
e.g. Totally Satisfied, Satisfied, Neutral, Dissatisfied, totally dissatisfied
interval scale
⼀Answer:- a scale of measurement in which the intervals between
numbers (distance) on the scale are all equal in size, lacks absolute zero
e.g. number lines
ratio scale
⼀Answer:- A continuous scale, each point reflects the same difference,
contains absolute zero and measures all central tendencies.
e.g. age, weight, height
**No negatives
What are descriptive statistics
⼀Answer:- Summarize the data contains central tendencies, variability,
relationships.
Psych 3402 Exam 1 Seaberg Questions
with Detailed Verified Answers
Difference between sample and population
⼀Answer:- ~Population: is every individual that the research pertains to.
(mean=μ)
~Sample: selection form the population that was tested (mean=xbar)
Experimental Method
⼀Answer:- Only methodology that can demonstrate cause and effect:
~ multiply groups
~Group make-up is identical
~One group is unchanged, the other group is manipulated
~Independent Variable
~Dependent Variable
~Cofounding Variable
What is a discrete variable? Continuous?
, Page | 2
⼀Answer:- Discrete: Hard boundaries between groups
Continuous: range, spectrum, degrees can be redefined as discrete, but
info can be lost
~discrete however can not turn continuous.
Four types of scales? Examples
⼀Answer:- ~Nominal
~Ordinal
~Interval
~Ratio
Nominal Scale
⼀Answer:- a scale in which objects or individuals are assigned to
categories that have no numerical properties
e.g. Data is gender: Male or female
ordinal scale
, Page | 3
⼀Answer:- a scale of measurement in which the measurement categories
form a rank order along a continuum
e.g. Totally Satisfied, Satisfied, Neutral, Dissatisfied, totally dissatisfied
interval scale
⼀Answer:- a scale of measurement in which the intervals between
numbers (distance) on the scale are all equal in size, lacks absolute zero
e.g. number lines
ratio scale
⼀Answer:- A continuous scale, each point reflects the same difference,
contains absolute zero and measures all central tendencies.
e.g. age, weight, height
**No negatives
What are descriptive statistics
⼀Answer:- Summarize the data contains central tendencies, variability,
relationships.
