Math 534 week 6 homework - Study guides, Class notes & Summaries

2 Determine the Pearson product-moment correlation coefficient for the following data.x 3 Given a set of paired data,{X,Y},if Y is independent of X , you would expect that the correlation

1. Whichofthefollowingisnotanassumptionoftheregressionmodel? 2. Supposeforagivendatasettheregressionequationis:y=54.78+1.45x, and the point (0.00, 24.78) is in the data set. The residual forthispointis . 3. If the standard error of the estimate for a regression model fitted toalargenumberofpairedobservationsis1.75,approximately68%oftheresidualswouldliewithin . 4. Foraregressionmodely=30−2x,thecoefficientofdeterminationwasdeterminedasequalto0.81.Thecoefficientofcorrelationis

MATH 534 Week 6 Addendum Homework-Quiz Review b. Whatisthe90%confidenceintervalforchildrenwhoare12yearsold?Answer:(18.92, 21.72) 13. Hypothesistestsforindividualregressioncoefficients(i.e.B0,B1)modeluset-tests. 9. We want to predict weight (y) based on height (x).The following equation shows therelationship:ŷ=70+1.3x.Ifsomeoneis65inchestall,whatwouldthepredictedweightbe?Answer:154.5

1. Question: You can skip #16 in the homework and #9 and #10 in the quiz. Everyone will be given credit. The problems look something like this: 2. Question: Review definitions and concepts in the notes. 3. Question: We are developing a regression model to predict weight as function of height. a. What is the explanatory variable (independent variable)? b. What is the response variable (dependent variable)? 4. Question: In the following regression: ŷ = 27.7 + 3.25x a. What is the slope?...