C955✦
Western Governors University
MAXE • 559C
✦
OA College of Information Technology · C955 Applied Probability & Statistics
A NEW KIND OF U. · AFFORDABLE, ACCREDITED, ONLINE.
EST. 1997
C955 — Applied Probability & Statistics
G R A P H I C A L D I S P L AYS · S A M P L I N G M E T H O D S · P R O B A B I L I TY · ST U DY D E S I G N · CO R R E L AT I O N
INSTITUTION Western Governors University (WGU) COURSE CODE C955
PROGRAM Bachelor of Science in Information ACADEMIC YEAR
Technology
EXAM TITLE Applied Probability & Statistics TOTAL QUESTIONS 25 Questions
SUBJECT AREAS Displays · Sampling · Probability · Study FORMAT Multiple Choice — Select the Single Best
Design Answer
EXAMINATION INSTRUCTIONS
▸ Select the single best answer for each question based on the C955 Applied Probability & Statistics course material.
▸ Content covers: graphical displays (histogram, box plot, scatter plot, two-way table, side-by-side box plots), measures of center
and spread, standard deviation rule (68-95-99.7), sampling methods (SRS, systematic, stratified, cluster, convenience,
voluntary), study design (observational vs. experimental, prospective, matched pairs), Simpson's Paradox, probability rules
(independent, conditional, OR/AND), and correlation.
▸ Key formulas: P(A or B) = P(A) + P(B) − P(A and B), P(A and B) = P(A) × P(B|A), independent: P(A and B) = P(A) × P(B).
SECTION I — DATA DISPLAYS, SAMPLING, PROBABILITY & STUDY Questions 1 –
DESIGN 25
1. What graphical representation uses bars to measure the frequency within each interval for quantitative data?
A. Box plot — displays five-number summary.
B. Histogram — bars representing frequency within intervals.
C. Scatter plot — displays Q→Q relationships.
D. Two-way table — displays C→C relationships.
CORRECT ANSWER B — Histogram — bars representing frequency within intervals.
RATIONALE A HISTOGRAM is a graphical representation using bars that measure frequency within each interval — used for
quantitative data. A box plot displays the five-number summary (min, Q1, median, Q3, max). A scatter plot
displays Q→Q (quantitative to quantitative) relationships. A two-way table displays C→C (categorical to
categorical) relationships. A side-by-side box plot displays C→Q (categorical to quantitative). Skewed right
means the tail is on the right side.
Western Governors University
MAXE • 559C
✦
OA College of Information Technology · C955 Applied Probability & Statistics
A NEW KIND OF U. · AFFORDABLE, ACCREDITED, ONLINE.
EST. 1997
C955 — Applied Probability & Statistics
G R A P H I C A L D I S P L AYS · S A M P L I N G M E T H O D S · P R O B A B I L I TY · ST U DY D E S I G N · CO R R E L AT I O N
INSTITUTION Western Governors University (WGU) COURSE CODE C955
PROGRAM Bachelor of Science in Information ACADEMIC YEAR
Technology
EXAM TITLE Applied Probability & Statistics TOTAL QUESTIONS 25 Questions
SUBJECT AREAS Displays · Sampling · Probability · Study FORMAT Multiple Choice — Select the Single Best
Design Answer
EXAMINATION INSTRUCTIONS
▸ Select the single best answer for each question based on the C955 Applied Probability & Statistics course material.
▸ Content covers: graphical displays (histogram, box plot, scatter plot, two-way table, side-by-side box plots), measures of center
and spread, standard deviation rule (68-95-99.7), sampling methods (SRS, systematic, stratified, cluster, convenience,
voluntary), study design (observational vs. experimental, prospective, matched pairs), Simpson's Paradox, probability rules
(independent, conditional, OR/AND), and correlation.
▸ Key formulas: P(A or B) = P(A) + P(B) − P(A and B), P(A and B) = P(A) × P(B|A), independent: P(A and B) = P(A) × P(B).
SECTION I — DATA DISPLAYS, SAMPLING, PROBABILITY & STUDY Questions 1 –
DESIGN 25
1. What graphical representation uses bars to measure the frequency within each interval for quantitative data?
A. Box plot — displays five-number summary.
B. Histogram — bars representing frequency within intervals.
C. Scatter plot — displays Q→Q relationships.
D. Two-way table — displays C→C relationships.
CORRECT ANSWER B — Histogram — bars representing frequency within intervals.
RATIONALE A HISTOGRAM is a graphical representation using bars that measure frequency within each interval — used for
quantitative data. A box plot displays the five-number summary (min, Q1, median, Q3, max). A scatter plot
displays Q→Q (quantitative to quantitative) relationships. A two-way table displays C→C (categorical to
categorical) relationships. A side-by-side box plot displays C→Q (categorical to quantitative). Skewed right
means the tail is on the right side.
