C207 OA STUDY GUIDE Questions with 100%
Correct Answers
Nominal
Just Names that can be counted
Whole number, count, or total
(color of eyes, type of vehicle)
Ordinal
Names that can be placed in an order and then counted
Whole number, count, or total
(top 10 football teams, satisfaction levels)
Interval
Numbers that have equal intervals and an order, but no true zero
Can be added and subtracted (NOT multiplied/divided)
(shirt size, dates, times)
Ratio
Numbers that have equal intervals and an order, but also have a true zero
Can be added, subtracted, multiplied, divided, and ratioed
(percentages, money, rates)
Normal Distribution/Bell Curve
68.3 % of data within 1 σ of the mean
95.4 % of data within 2 σ of the mean
99.7 % of data within 3 σ of the mean
Intersection
, "And, Both, All, Every, In a row"
MULTIPLICATION
Union
"Or, Either, Other"
ADDITION
Bayes
"Given that"
A, B =events
P (A|B) =probability of A given B is true
P (B|A) =probability of B given A is true
P(A), P(B) =the independent probabilities of A and B
Regression Keywords:
Relationship, correlation, R-Square, scatter plot
R-square (Goodness of fit) Keywords:
strength of the relationship; 0 Weaker to 1 Stronger relationship
Logistic Regression:
The dependent variable is binary (Yes/NO or On/Off)
Linear Programming:
Uses Constraints and keywords that are associated with the letter
“M”. Mix, minimize, maximize, optimize
2-Sample T-Test:
Difference among 2 data sets that measure the same thing; use a bar chart
ANOVA:
Correct Answers
Nominal
Just Names that can be counted
Whole number, count, or total
(color of eyes, type of vehicle)
Ordinal
Names that can be placed in an order and then counted
Whole number, count, or total
(top 10 football teams, satisfaction levels)
Interval
Numbers that have equal intervals and an order, but no true zero
Can be added and subtracted (NOT multiplied/divided)
(shirt size, dates, times)
Ratio
Numbers that have equal intervals and an order, but also have a true zero
Can be added, subtracted, multiplied, divided, and ratioed
(percentages, money, rates)
Normal Distribution/Bell Curve
68.3 % of data within 1 σ of the mean
95.4 % of data within 2 σ of the mean
99.7 % of data within 3 σ of the mean
Intersection
, "And, Both, All, Every, In a row"
MULTIPLICATION
Union
"Or, Either, Other"
ADDITION
Bayes
"Given that"
A, B =events
P (A|B) =probability of A given B is true
P (B|A) =probability of B given A is true
P(A), P(B) =the independent probabilities of A and B
Regression Keywords:
Relationship, correlation, R-Square, scatter plot
R-square (Goodness of fit) Keywords:
strength of the relationship; 0 Weaker to 1 Stronger relationship
Logistic Regression:
The dependent variable is binary (Yes/NO or On/Off)
Linear Programming:
Uses Constraints and keywords that are associated with the letter
“M”. Mix, minimize, maximize, optimize
2-Sample T-Test:
Difference among 2 data sets that measure the same thing; use a bar chart
ANOVA:
