C207 OA STUDY GUIDE Questions with Correct Solutions
Question:
1. Nominal
Answer:
Just Names that can be counted Whole number, count, or total (color of eyes, type of vehicle)
Question:
2. Ordinal
Answer:
Names that can be placed in an order and then counted Whole number, count, or total (top 10
football teams, satisfaction levels)
Question:
3. Interval
Answer:
Numbers that have equal intervals and an order, but no true zero Can be added and
subtracted (NOT multiplied/divided) (shirt size, dates, times)
Question:
4. Ratio
Answer:
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)
Question:
5. Normal Distribution/Bell Curve
Answer:
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
Question:
6. Intersection
Answer:
"And, Both, All, Every, In a row" MULTIPLICATION
, Question:
7. Union
Answer:
"Or, Either, Other" ADDITION
Question:
8. Bayes
Answer:
"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
Question:
9. Regression Keywords:
Answer:
Relationship, correlation, R-Square, scatter plot
Question:
10. R-square (Goodness of fit) Keywords:
Answer:
strength of the relationship; 0 Weaker to 1 Stronger relationship
Question:
11. Logistic Regression:
Answer:
The dependent variable is binary (Yes/NO or On/Off)
Question:
12. Linear Programming:
Answer:
Uses Constraints and keywords that are associated with the letter "M". Mix, minimize,
maximize, optimize
Question:
13. 2-Sample T-Test:
Answer:
Difference among 2 data sets that measure the same thing; use a bar chart
Question:
1. Nominal
Answer:
Just Names that can be counted Whole number, count, or total (color of eyes, type of vehicle)
Question:
2. Ordinal
Answer:
Names that can be placed in an order and then counted Whole number, count, or total (top 10
football teams, satisfaction levels)
Question:
3. Interval
Answer:
Numbers that have equal intervals and an order, but no true zero Can be added and
subtracted (NOT multiplied/divided) (shirt size, dates, times)
Question:
4. Ratio
Answer:
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)
Question:
5. Normal Distribution/Bell Curve
Answer:
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
Question:
6. Intersection
Answer:
"And, Both, All, Every, In a row" MULTIPLICATION
, Question:
7. Union
Answer:
"Or, Either, Other" ADDITION
Question:
8. Bayes
Answer:
"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
Question:
9. Regression Keywords:
Answer:
Relationship, correlation, R-Square, scatter plot
Question:
10. R-square (Goodness of fit) Keywords:
Answer:
strength of the relationship; 0 Weaker to 1 Stronger relationship
Question:
11. Logistic Regression:
Answer:
The dependent variable is binary (Yes/NO or On/Off)
Question:
12. Linear Programming:
Answer:
Uses Constraints and keywords that are associated with the letter "M". Mix, minimize,
maximize, optimize
Question:
13. 2-Sample T-Test:
Answer:
Difference among 2 data sets that measure the same thing; use a bar chart
