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The arithmetic mean (or simply mean or average) of a list of numbers, is the sum of all of the numbers divided by their count.Similarly, the mean of a sample ,, …,, usually denoted by ¯, is the sum of the sampled values divided by the number of items in the sample.
The analysis prompt typically asks students to read a short (less than 1 page) passage, which may have been written at any time, as long as it was originally written in modern English. After reading the passage, students are asked to write an essay in which they analyze and discuss various techniques the author uses in the passage.
Free response questions require test takers to respond to a question or open-ended prompt with a prose response. In addition to being graded for factual correctness, free response questions may also be graded for persuasiveness, style, and demonstrated mastery of the subject material.
A questionnaire is a research instrument that consists of a set of questions (or other types of prompts) for the purpose of gathering information from respondents through survey or statistical study. A research questionnaire is typically a mix of close-ended questions and open-ended questions.
A typical "Business Statistics" course is intended for business majors, and covers [71] descriptive statistics (collection, description, analysis, and summary of data), probability (typically the binomial and normal distributions), test of hypotheses and confidence intervals, linear regression, and correlation; (follow-on) courses may include ...
Statistics is the mathematical science involving the collection, analysis and interpretation of data. A number of specialties have evolved to apply statistical and methods to various disciplines. Certain topics have "statistical" in their name but relate to manipulations of probability distributions rather than to statistical analysis.
Expository writing is a type of writing where the purpose is to explain or inform the audience about a topic. [13] It is considered one of the four most common rhetorical modes. [14] The purpose of expository writing is to explain and analyze information by presenting an idea, relevant evidence, and appropriate discussion.
The arithmetic mean of a population, or population mean, is often denoted μ. [2] The sample mean ¯ (the arithmetic mean of a sample of values drawn from the population) makes a good estimator of the population mean, as its expected value is equal to the population mean (that is, it is an unbiased estimator).