Question

Problem 4: [6 pts.]  Blood fat content may be influenced by many factors including age and weight. A nutritionist collected data on blood fat content, age and weight from sample of people. The data are saved in the file Assn1Q4.sav. The aim was to investigate how blood fat content is related to age and weight of individuals. 

1. ^{[1 pt.]}Check if the linear regression is appropriate to model the blood fat content depending on age and weight?

2. ^{[1 pt.]} Give the estimated egression equation of Blood fat on the age and the weight.

3. ^{[1 pts.]} Interpret the coefficient of age.

4. ^{[1 pts.]} Test the validity of the model given in (b).

5. ^{[1 pt.]} Test (at 2% level) whether the effect of age is significant on the blood fat.

6. ^{[1 pt.]} Find the coefficient of determination? Explain this value with respect to predictive power of the estimated regression model.

Please mentioned the steps in SPSS.

Weight	Age	Blood fat
84.00 73.00 65.00 70.00 76.00 69.00 63.00 72.00 79.00 75.00 27.00 89.00 65.00 57.00 59.00 69.00 60.00 79.00 75.00 82.00 59.00 67.00 85.00 55.00 63.00	46 20 52 30 57 25 28 36 57 44 24 31 52 23 60 48 34 51 50 34 46 23 37 40 30	354.00 190.00 405.00 263.00 451.00 302.00 288.00 385.00 402.00 365.00 209.00 290.00 346.00 254.00 395.00 434.00 220.00 374.00 308.00 220.00 311.00 181.00 274.00 303.00 244.00

Answer 1