NYC Information Ordering and Visualization 4 — Questions and Answers
Question 1: A scatter plot comparing officer years of experience (x-axis) against number of commendations (y-axis) shows a cluster of points rising from left to right. What does this pattern indicate?
- No relationship between experience and commendations
- Officers with more experience tend to receive more commendations (Correct answer)
- Officers with fewer commendations have more experience
- The data contains too many errors to interpret
Correct answer: Officers with more experience tend to receive more commendations
A left-to-right upward cluster indicates a positive correlation — as experience increases, commendations tend to increase as well.
Question 2: A civil service exam roster lists candidates in the following order: Williams, Nguyen, Martinez, Johnson, Chen. What ordering principle was used?
- Ascending numeric score
- Reverse alphabetical by last name (Correct answer)
- Alphabetical by last name
- Order of registration
Correct answer: Reverse alphabetical by last name
The names descend from W to C, which is reverse (Z-to-A) alphabetical order by last name.
Question 3: A flowchart for processing a permit application contains a diamond-shaped decision box labeled 'Is the application complete?' with YES and NO branches. What does the diamond shape specifically represent?
- A data storage step
- A process or action step
- A decision point requiring a yes/no or true/false answer (Correct answer)
- The start or end of the process
Correct answer: A decision point requiring a yes/no or true/false answer
In standard flowchart notation, a diamond shape always represents a decision point with two or more possible paths.
Question 4: A supervisor must rank five employees by performance score from highest to lowest: Rivera (88), Thompson (92), Okafor (88), Lee (95), Patel (79). How should Rivera and Okafor be ordered relative to each other?
- Rivera before Okafor because R comes before O alphabetically in reverse
- Okafor before Rivera because O comes before R alphabetically (Correct answer)
- Rivera before Okafor because she was hired first
- Their order does not matter since their scores are equal
Correct answer: Okafor before Rivera because O comes before R alphabetically
When scores are tied, a common tiebreaker is alphabetical order by last name; O (Okafor) comes before R (Rivera).
Question 5: A histogram shows the distribution of response times (in minutes) for emergency calls. Most bars are clustered between 4–8 minutes, with a long tail extending to 30 minutes. What does this distribution shape indicate?
- Response times are uniformly distributed
- The data is skewed right, with most calls responded to quickly but some taking much longer (Correct answer)
- The data is skewed left, with most calls taking a long time
- The histogram is drawn incorrectly and must be redone
Correct answer: The data is skewed right, with most calls responded to quickly but some taking much longer
A long tail to the right indicates right skew — the majority of values are low, but a few extreme high values pull the tail out.
Question 6: A records clerk must file documents using the following rule: numbers before letters, then alphabetically. Where does the file labeled '7B-Housing' belong relative to 'B7-Housing' and 'A-Housing'?
- After B7-Housing
- Before A-Housing (Correct answer)
- Between A-Housing and B7-Housing
- Its position depends on the document date
Correct answer: Before A-Housing
The rule places numeric-prefixed files before alphabetic-prefixed files, so '7B-Housing' comes before 'A-Housing' and 'B7-Housing'.
Question 7: Which of the following best describes the purpose of adding a data label directly onto a bar in a bar chart?
- To replace the need for an x-axis title
- To allow the reader to read the exact value without consulting the y-axis scale (Correct answer)
- To indicate that the bar represents a forecast rather than actual data
- To show the percentage each bar contributes to the total
Correct answer: To allow the reader to read the exact value without consulting the y-axis scale
Data labels display the precise numeric value on or near a bar, eliminating the need to estimate from the y-axis gridlines.
NYC Information Ordering and Visualization 4
A scatter plot comparing officer years of experience (x-axis) against number of commendations (y-axis) shows a cluster of points rising from left to right.
What does this pattern indicate?