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# Chap 1 COMM215.doc

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Concordia University

Commerce

COMM 217

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Fall

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Chapter 01What is StatisticsChapter 01What is StatisticsTrueFalse Questions 1 A population is a collection of all individuals objects or measurements of interest TrueFalse 2 A sample is a portion or part of the population of interest TrueFalse 3 To infer something about a population we usually take a sample from the population TrueFalse 4 The techniques used to find out something about a population such as their average weight based on a sample are referred to as descriptive statistics TrueFalse 5 There are four levels of measurementqualitative quantitative discrete and continuous TrueFalse 6 The ordinal level of measurement is considered the lowest level of measurement TrueFalse 7 A store asks shoppers for their zip code to identify market areas Zip codes are an example of ratio data TrueFalse 11Chapter 01What is Statistics8 An ordinal level of measurement implies some sort of ranking TrueFalse 9 Data that can only be classified into categories is measured with a nominal scale TrueFalse 10 The terms descriptive statistics and inferential statistics can be used interchangeably TrueFalse 11 A marketing research agency was hired to test a new DVD player Consumers rated it outstanding very good fair or poor The level of measurement for this experiment is ordinal TrueFalse 12 The Union of Electrical Workers of America with 9128 members polled 362 members about a new wage package that will be submitted to management The population is the 362 members TrueFalse 13 The CIA World Factbook cited these numbers for the US Birthrate is 1414 births per 1000 population Average life expectancy for females is 80 years Approximately 290 million persons residing in the United StatesEach of these numbers is referred to as statistic TrueFalse 14 If we select 100 persons from 25000 registered voters and question them about candidates and issues the 100 persons are referred to as the population TrueFalse 12Chapter 01What is Statistics15 Statistics is defined as a body of techniques used to facilitate the collection organization presentation analysis and interpretation of information for the purpose of making better decisions TrueFalse 16 Another name for inductive statistics is descriptive statistics TrueFalse 17 Categorizing voters as Democrats Republicans and Independents is an example of interval level measurement TrueFalse 18 The order that runners finish in a race would be an example of continuous data TrueFalse 19 Based on a sample of 3000 people the civilian unemployment rate in the United States was 55 55 is referred to as a statistic TrueFalse 20 The principal difference between the interval and ratio scale is that the ratio scale has a meaningful zero point TrueFalse 21 The branch of mathematics used to facilitate the collection organization presentation analysis and interpretation of numerical data is referred to as a statistic TrueFalse 22 The number of children in a family is a discrete variable TrueFalse 13

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