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Rev exp - Quantitative & Qualitative Data Analysis Powerpoint

# Rev exp - Quantitative & Qualitative Data Analysis Powerpoint

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Coverag e This module is divided into 2 parts: Part Part I : Quantitative Data Analysis II : Qualitativ e Dat a Analysi s 2

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Part I Quantitativ e Dat a Analysi s 9
INTRODUCTIO N The research process: Definition of research problem Operational definition of variables Review of related literature Research Design Target Population & Samples Instrumentation Pilot study – validity & Actual study reliabilit y Data entry & Reporting Analysi s 10

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Definition of statistics American Heritage Dictionary ® defines statistics as: “The mathematics of the collection, organization, and interpretation of numerical data, especially the analysis of population characteristi cs byinferenc e fro m sampling .” 11
What is “statistics”? Statistics can be divided into: Descriptive Statistics Inferential Statistics Descriptive Statistics Used to describe the basic features of the data in a study. Provide simple summaries about the sample and the measures. Describe what is or what the data show. Help us to simplify large amounts of data in a sensible way. Include graphs, charts and tables and the calculation of various descriptive measures such as averages (means) and measures of variation (standard deviations). 12

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What is “statistics”? Inferential Statistics Used to make inferences concerning some unknown aspect of a population. Used to make conclusions about a population based on information obtained from a sample of the population. Provide conclusions solely on what one already knows. Descriptive and inferential statistics – How do they relate to your thesis? Chapter 4: Results of study must have both descriptive and inferential statistics. You must use descriptive statistics to organise and summarise the information obtained from a sample before carrying out an inferential analysis. 13
What are variables? A variable is a construct that is deliberately and consciously invented or adopted for a special scientific purpose. Merriam-Webster Online dictionary defines variable as “a quantity that may assume any one of a set of value”. Dependent variable : a mathematical variable whose value is determined by that of one or more other variables in a function. Independent variable : a variable that is presume d to caus e a chang e in th e depende nt variabl e. 14

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What are variables? Continuous variable Rating scale Test scores Categorical variable Gender Occupation ordinal and interval – nomin al variabl e 15
What are variables? Given the statements below: What are the variables? What is the dependent variable? What are the independent variables? Intelligence Quotient (IQ) and Attitude Influence Performance in To what extent achievement in Mathematics does socio-economic status affect students’ science and mathematics?

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• Fall '15
• Qualitative Research, researcher, Grounded theory

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