Homework 2

# Homework 2 - Homework 2 The table below shows the number of...

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Homework 2 The table below shows the number of people (in million of people who live on a farm). Year: 1935 1940 1945 1950 1955 1960 1965 1970 1975 1980 Population: 32.1 30.5 24.4 23.0 19.1 15.6 12.4 9.7 8.9 7.2 1. What is the correlation coefficient (numerical value)? 2. What is the regression equation? 3. Predict the number of people living on farms in 2004. What is wrong with such a prediction? 4. Interpret b in the regression equation found in 2.
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Unformatted text preview: A child’s height is measured in centimeters and age in months. Age (months): 36 48 51 54 57 60 Height (cm): 86 90 91 93 94 95 5. What is the correlation coefficient (numerical value)? 6. Let X be age and Y be height. Find the linear regression equation for the data. 7. If this child is to be measured on his 7 th birthday, how tall would you expect him to be? 8. Interpret a in the regression equation found in 5. Is this a useful interpretation?...
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• Fall '07
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