RegressionQuizQuestions

# RegressionQuizQuestions - 1 A study of nutrition in...

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1. A study of nutrition in developing countries collected data from the Egytian village of Nahya. Here are the mean weights (in kilograms) for 170 infants in Nahya who were weighed each month during the first year of life (n=12 months). A part of the Minitab ouput is below. Find the 95% confidence interval for the slope. Predictor Coef SE Coef T P Constant 4.8803 0.2895 16.86 0.000 Age 0.26713 0.03933 6.79 0.000 a) (4.31, 5.45) b) (4.24, 5.53) c) (-1.65, 2.27) d) (0.1795, 0.355) 2. The Leaning Tower of Pisa is an architectural wonder. The tower started to lean during constuction, which started in the year 1176 and continued for about 200 years. Engineers concerned about the tower's stability have done extensive studies of its increasing tilt. Measurements of the lean of the tower represent the difference between where a point on the tower would be if the tower were straight and where it actually is. The data are coded as tenths of a millimeter in excess of 2.9 meters, so a value of 642 on the graph corresponds to a lean of 2.9642 meters. The measurements in this study were taken from 1975 to 1987 (n=13 years), and only the last two digits of the year were entered into the computer. Find the 99% confidence interval for the slope. Predictor Coef SE Coef T P Constant -61.12 25.13 -2.43 0.033 year 9.3187 0.3099 30.07 0.000 a) (-139.17, 16.93) b) (-110.37, -11.87) c) (8.36, 10.28) d) (8.71, 9.93) 3. We want to predict people's height based on the length of their forearm (both measured in inches). We have data on 50 students that give the following summary statistics.

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## This note was uploaded on 12/15/2011 for the course STA 3024 taught by Professor Ta during the Spring '08 term at University of Florida.

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RegressionQuizQuestions - 1 A study of nutrition in...

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