10_chapter_one_and_two_akram

10_chapter_one_and_two_akram - Chapters One & Two:...

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Chapters One & Two: STATS Starts Here and Data Learning Objectives 1. Define Statistics 2. Describe the Statistical Process 3. Distinguish between: Descriptive & Inferential Statistics 5. Distinguish between Qualitative and Quantitative Variables 6. Sources of Data 7. Different types of Samples 8. Sources of Sampling Error
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Statistics is the science of problem solving using data. A statistical investigative process involves with collecting, organizing, summarizing and analyzing information in order to draw conclusions. 1.1 Introduction to the Practice of Statistics
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EXAMPLE: How can statistical techniques be applied to solve the following problem? UCLA is interested in revising its recruiting policy. A study will be conducted to find out where the current UCLA students come from and the reasons for choosing ULCA.
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The Process of a Statistical Investigation Step 1: Identify a Research Objective Step 2: Collect the information needed to answer the questions. Step 3: Organize and summarize the information. Step 4: Draw conclusions from the information.
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The Process of a Statistical Investigation Step 1: Identify a Research Objective • Researcher must determine a question he/she wants answered - question must be detailed. • Identify the group to be studied. This group is called the population. • An individual is a person or object that is a member of the population being studied is the Sampling unit .
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Step 2: Collect the information needed to answer the questions. • In conducting research, we typically look at a subset of the population, called a sample . Step 3: Organize and summarize the information. Descriptive statistics consists of organizing and summarizing the information collected. Consists of charts, tables, and numerical summaries. The Process of Statistical Investigation
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The Process of Statistical Investigation Step 4: Draw conclusions from the information. The information collected from the sample is generalized to the population. Inferential statistics uses methods that generalize results obtained from a sample to the population and measure their reliability.
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Step 1: Identify the research objective. Consider the Recruiting Example: To investigate where the current UCLA students come from and the reasons for choosing UCLA. So that the information can be used for revising recruiting policy. Determine the target population for the study:
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This note was uploaded on 12/03/2011 for the course STATISTICS 10 taught by Professor Gould during the Fall '11 term at UCLA.

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10_chapter_one_and_two_akram - Chapters One & Two:...

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