Postal Exam 955 study materials
Postal Exam 955 study resources

Postal Exam 955 key terms

Postal Exam 955 · Get comfortable with the vocabulary.

Inference

A conclusion drawn from evidence and reasoning rather than stated directly. On verbal tests, you identify what a passage implies even when the author never says it outright.

Related: Assumption, Main Idea
Main Idea

The central point or overall message of a passage. It summarizes what the text is mostly about and is often supported by smaller details throughout the reading.

Related: Supporting Detail, Inference
Supporting Detail

A specific fact, example, or statement that explains, proves, or clarifies the main idea. Details answer who, what, when, where, or how questions about the passage.

Related: Main Idea
Synonym

A word that has the same or nearly the same meaning as another word. Recognizing synonyms helps you understand passages and answer vocabulary questions without outside knowledge.

Related: Antonym, Context Clue
Antonym

A word that means the opposite of another word. Identifying contrasts between words helps you understand meaning and answer questions that ask for opposites.

Related: Synonym
Context Clue

A hint in the surrounding words, sentence, or passage that helps you figure out the meaning of an unfamiliar word. Clues can be examples, contrasts, or definitions nearby.

Related: Synonym, Inference
Analogy

A comparison between two pairs of words that share a similar relationship. Solving analogies requires identifying how the first pair is related and applying the same relationship to the second pair.

Related: Synonym, Antonym
Assumption

An idea accepted as true without being directly stated. In reasoning questions, an unstated assumption is often required for the argument or conclusion to make sense.

Related: Inference
Fact vs. Opinion

A fact is a statement that can be proven true or false with evidence. An opinion expresses a belief, feeling, or judgment that cannot be proven objectively.

Related: Inference, Supporting Detail
Logical Sequence

The order in which ideas, events, or steps follow one another in a sensible way. Questions may ask you to arrange sentences or steps into the correct order.

Related: Main Idea
Ratio

A comparison of two quantities by division, often written as "a to b" or a:b. Ratios show how much of one thing exists relative to another.

Related: Proportion, Percentage
Proportion

An equation stating that two ratios are equal. Proportions are used to solve problems where quantities change at the same rate, such as scaling recipes or maps.

Related: Ratio
Percentage

A number expressed as a part of 100. Percentages make comparisons easier and are used in discounts, interest, and data reporting.

Related: Ratio, Proportion
Average (Mean)

The sum of a set of numbers divided by how many numbers are in the set. The mean gives a single value that represents the center of the data.

Related: Median
Median

The middle value in a set of numbers arranged in order from least to greatest. If there is an even number of values, the median is the average of the two middle numbers.

Related: Average (Mean)
Rate

A ratio that compares two quantities measured in different units, such as miles per hour or cost per item. Rates often describe how one quantity changes relative to another.

Related: Ratio, Unit Conversion
Unit Conversion

Changing a measurement from one unit to another while keeping the same value, such as converting minutes to hours. Conversion factors are used to multiply or divide correctly.

Related: Rate, Estimation
Estimation

Finding an answer that is close enough to the exact value by rounding or using approximate numbers. Estimation saves time and helps you check whether a calculated answer is reasonable.

Related: Rounding
Rounding

Replacing a number with a nearby, simpler number that has fewer digits, usually based on a chosen place value. Rounding helps simplify calculations and report approximate results.

Related: Estimation
Order of Operations

The agreed sequence for evaluating math expressions: parentheses, exponents, multiplication and division from left to right, then addition and subtraction from left to right.

Related: Estimation
Discrepancy

A difference or inconsistency between two things that should match, such as two records, totals, or lists. Finding discrepancies is a core part of error-checking tasks.

Related: Consistency, Cross-Check
Transposition Error

A mistake in which two characters, digits, or letters are switched in order, such as writing "1234" as "1324." These errors are common in data entry and must be caught by careful checking.

Related: Omission, Proofreading
Omission

Something that has been left out or missing from a document, list, or set of data. Spotting omissions means comparing what should be present with what actually appears.

Related: Discrepancy
Proofreading

Carefully reading text to find and correct errors in spelling, grammar, punctuation, or formatting. Proofreading requires slow, focused attention rather than fast scanning.

Related: Verification, Consistency
Cross-Check

Comparing information from two or more sources or methods to confirm accuracy. Cross-checking helps catch mistakes that might not be visible when reviewing only one source.

Related: Verification, Discrepancy
Alphanumeric Filing Order

A system for arranging records using letters and numbers according to set rules, such as alphabetizing names or sorting numeric codes in sequence. Correct order makes files easy to find and retrieve.

Related: Consistency
Verification

Confirming that information is true, correct, or matches an official source. Verification often involves checking names, numbers, dates, or codes against a reference before acting.

Related: Cross-Check, Proofreading
Consistency

Keeping the same format, spelling, values, or rules throughout a document or set of records. Inconsistent entries can signal errors and make information harder to trust.

Related: Discrepancy, Verification
Prioritization

Deciding which tasks or problems should be handled first based on importance, urgency, deadlines, or impact. Good prioritization helps you manage time and focus on what matters most.

Related: Escalation
Escalation

Referring a problem or decision to a supervisor or higher authority when it is beyond your authority or expertise. Escalation should be timely and follow workplace procedures.

Related: Chain of Command, Prioritization
Chain of Command

The formal line of authority in an organization that shows who reports to whom. Following it means communicating concerns or decisions through the proper levels.

Related: Escalation
Confidentiality

Protecting private or sensitive information from being shared with people who are not authorized to see it. Confidentiality is a basic workplace and legal responsibility.

Related: Policy Compliance, Professionalism
Conflict Resolution

The process of addressing disagreements between people in a calm, respectful way to reach a workable solution. It often involves listening, clarifying facts, and finding common ground.

Related: Professionalism
Accountability

Taking responsibility for your own actions, decisions, and mistakes. Accountable employees follow through on commitments and report problems honestly rather than hiding them.

Related: Professionalism, Policy Compliance
Policy Compliance

Following an organization's written rules, procedures, and standards. Compliance protects safety, fairness, and legal obligations, and violations may lead to discipline or other consequences.

Related: Confidentiality, Accountability
Professionalism

Behaving in a respectful, reliable, and appropriate manner at work. It includes punctuality, courtesy, appropriate communication, and keeping personal issues from interfering with job duties.

Related: Conflict Resolution, Accountability