Interpret the slope - Study guides, Class notes & Summaries

1) The following graph and regression result gives the (hypothetical) IQ scores for 2 nd graders and the number of hours they watch TV each week. Simple linear regression results: Dependent Variable: IQ Independent Variable: TV hours/week IQ = 142.71914 - 3.1612654 TV hours/week Sample size: 20 R (correlation coefficient) = -0. a) Find the predicted IQ for a 2 nd grader who watches 4 hours of TV per week. Using the regression equation: IQ = 142.72 – 3.16 (4) = 130.08. The predicted IQ...

response (dependent) variables - correct answer one particular variable that we are interested in understanding or modeling (y) predicting or explanatory (independent) variables - correct answer a set of other variables that might be useful in predicting or modeling the response variable (x1, x2) What kind of variable is a response variable and why? - correct answer random, because i...

response (dependent) variables - correct answer one particular variable that we are interested in understanding or modeling (y) predicting or explanatory (independent) variables - correct answer a set of other variables that might be useful in predicting or modeling the response variable (x1, x2) What kind of variable is a response variable and why? - correct answer random, because it varies ...

Chapter 03 Test Bank - Static KEY 1. The median is the measure of central tendency that divides a population or sample into four equal parts. FALSE The median divides a population into two equal parts. AACSB: Reflective Thinking Blooms: Remember Difficulty: 1 Easy Learning Objective: 03-01 Compute and interpret the mean, median, and mode. Topic: Describing Central Tendency 2. The population mean is the average of the population measurements. TRUE AACSB: Reflective Thinking B...

lurking variable - correct answer A variable that is not included in an analysis but that is related to two (or more) other associated variables which were analyzed. simple linear regression - correct answer the prediction of one response variable's value from one explanatory variable's value Simpson's Paradox - correct answer A counterintuitive si...

There are _ Roles an _ plays 2, Economist Economist Role #1: As a Scientist Economist Role #2: As a Policy Advisor How is an Economist and a Scientist alike? They work together to EXPLAIN the world. How is an Economist and a Policy Advisor alike? They work together to IMPROVE the world. What method do both Economists and Scientists use to explain the World? The Scientific Method; through Observation, Theory and more Observation. What are Assumptions? Statements that help simplify th...

WEEK 8 ASSIGNMENT: CORRELATION AND CAUSATION CORRECT ANSWERS / ALREADY GRADED A Understand the difference between correlation and causation Question True or False: The more samples taken in a scientific study, the longer the amountof time it will take to complete the research on the samples. Although there are other factors that affect study time, such as experience and equipment, increasingthe number of samples will cause an increase in research time Correct! You nailed it. Understan...

Chapter 03 Test Bank - Static KEY The median is the measure of central tendency that divides a population or sample into four equal parts. 1. FALSE The median divides a population into two equal parts. 2. The population mean is the average of the population measurements. TRUE Learning Objective: 03-01 Compute and interpret the mean, median, and mode. Topic: Describing Central Tendency AACSB: Reflective Thinking Blooms: Remember Difficulty: 1 Easy AACSB: Reflective Thinking Blooms: Re...

MATH 225N Week 8 Interpret the Slope & Y-Intercept of the Least Squares Regression Line.

lurking variable - correct answer A variable that is not included in an analysis but that is related to two (or more) other associated variables which were analyzed. simple linear regression - correct answer the prediction of one response variable's value from one explanatory variable's value Simpson's Paradox - correct answer A counterintuitive situation in which a trend...