Stat

TEST 1 NOTES CHAPTER 1: INTRODUCTION 1.1 What is Statistics? Statistics The science of designing studies and analyzing the information that those studies produce. Statistics is the science of learning from data. For example, we whitethorn deficiency to know... (1)The average exercise of movies lot watch in one month (2)The about common color of a car (3)The proportion of masses who own a hound dog But of course, we cannot possibly taste everybody in the whole universe of discourse. This is as well time-consuming and costly. So, this is where statistics comes in. Statistics involves surveying hardly a handful of people, haphazard selected from the population, and then using the results in that attempt to make a conclusion about the population. Incidentally, the tone statistics was first coined in 1834 in Thurso, Scotland by Sir John Sinclair. 1 of 54 1.2 We Learn about cosmoss using Samples For the following definitions, keep in mind as an example predicting the outcome of an election. Definition state The total set of subjects in which we atomic number 18 interested. Ex. = The entire pick out public Sample A subset of the population for whom we have data. Ex. = cc randomly selected voters Subject entities that we posting in a study. Ex. = on an individual basis voter in the taste Parameter A issue lever summarizing the population data. Ex.

= component part of voters choose for candidate A in the entire population Statistic A numerical note value summarizing the sample data. Ex. = percentage of voters voting for candidate A in our sample (the 200 randomly selected voters) Here is a Venn piece illustrating the concepts. 2 of 54 Of course, there be many possible different samples that can be pinched from the population, so dickens divers(prenominal) researchers doing the comparable study will well-nigh certainly tack two different groups of people. That means that sample averages will differ, depending on which subjects are chosen. Example There are 1300 students taking STAT 2000, and wed kindred to know the proportion of these...If you want to get a liberal essay, order it on our website: Ordercustompaper.com

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