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Senger - BUS 345 - 9.10

# Senger - BUS 345 - 9.10 - week10 1 agenda attendance...

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1 substance for project work week 10

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2 agenda attendance chapter 8 quiz chapters 9 and 10 hand in proposals project updates/questions? extra credit (3 x’s): article reviews next week
3 agenda attendance chapter 8 quiz chapters 9 and 10 hand in proposals project updates/questions? extra credit (3 x’s): article reviews next week

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4 agenda attendance chapter 8 quiz chapters 9 and 10 hand in proposals project updates/questions? extra credit (3 x’s): article reviews next week
5 chapter 8 quiz T/F … An experiment is defined as:  Procedure in which one (or more) independent variable is  systematically manipulated and data on the dependent  variable are gathered, while controlling for other variables  that may influence the dependent variable. Which of these conditions is necessary to  infer causality (“X causes Y”)? Temporal ordering of variables  Evidence of association Control of other factors All of the above Describe the difference between internal and  external validity. Tell me how you feel about these weekly  quizzes.

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6 agenda attendance chapter 8 quiz chapters 9 and 10 hand in proposals project updates/questions? extra credit (3 x’s): article reviews next week
7 measurement and scaling chapter 9

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8 Measurement Basics Measurement – assignment of numbers to  responses, based on a set of guidelines. Summarize responses Manipulate quantified responses with math Fun with numbers Numbers follow a rank order (3 is greater than 1) Differences between numbers can be compared (3-1 = 4- 2) Assumes the intervals between them are equal Ratio between numbers reveals the relative magnitude of  the two numbers (6 is twice as large as 3 because 6/3 = 2) Assumes “zero” is a meaningful absence Is 60 °  twice as warm as 30 ° ?
9 Measurement Levels Central tendency – depicts the “middle”  position in a given range or distribution of  numbers. Mode  – most frequent response Median  – category into which the 50 th  %ile response  falls when all responses are arranged from lowest to  highest. Mean  – simple average of various numbers Standard deviation – degree of deviation from the mean Measurement levels: Nominal  – numbers are used as labels for different  responses What is your gender?   1. Male, 2. Female What does a mean of 1.5 represent?

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10 Measurement Levels Ordinal  – numbers imply rank order How much time did you spend online today?   1. 0-1 hour 3. 2-5 hours 2. 1-2 hours 4. 5+ hours What can we say about the results?
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