WGU C207 OA STUDY GUIDE QUESTIONS AND VERIFIED 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: Difference among three or more (Another) that measure the same thing; use a bar chart