There is an approximate linear relationship between the height of females and their age (from 5 to 18 years) described by height = 50.3+6.01 (age) where height is measured in centimeters and age in years. Which of the following is not correct?
a. The estimated slope is 6.01, which implies that children increase by about 6 cm for each year they grow older.
b. The estimated height of a child who is 10 years old is about 110 cm.
c. The estimated intercept is 50.3 cm, which implies that children reach this height when they are 50.3/6.01=8.4 years old.
d. The average height of children when they are 5 years old is about 50% of the average height when they are 18 years old.
e. My niece is about 8 years old and is about 115 cm tall. She is taller than average.
Answer: c. The estimated intercept is 50.3 cm, which implies that children reach this height when they are 50.3/6.01=8.4 years old.