It is commonly expected that as a person ages, their muscle mass decreases. To further examine this relationship in women, a nutritionist randomly selected 60 female patients from her clinic, 15 women from each 10-year age group beginning with age 40 and ending with age 80. For each patient, her age and current muscle mass was recorded. A scatterplot, least squares regression line, and coefficient of determination are as follows.
-Write a sentence interpreting the value of the slope in the context of the study.
A) A one year increase in age is associated with a 1.19 lb increase in predicted muscle mass.
B) A one year increase in age is associated with a 1.19 lb decrease in predicted muscle mass.
C) A one year increase in muscle mass is associated with a 1.19 lb increase in predicted age.
D) A one year increase in muscle mass is associated with a 1.19 lb decrease in predicted age.

Question

It is commonly expected that as a person ages, their muscle mass decreases. To further examine this relationship in women, a nutritionist randomly selected 60 female patients from her clinic, 15 women from each 10-year age group beginning with age 40 and ending with age 80. For each patient, her age and current muscle mass was recorded. A scatterplot, least squares regression line, and coefficient of determination are as follows. 
-Write a sentence interpreting the value of the slope in the context of the study.
A) A one year increase in age is associated with a 1.19 lb increase in predicted muscle mass. 
B) A one year increase in age is associated with a 1.19 lb decrease in predicted muscle mass. 
C) A one year increase in muscle mass is associated with a 1.19 lb increase in predicted age. 
D) A one year increase in muscle mass is associated with a 1.19 lb decrease in predicted age.

Quizplus · Accepted Answer

The Answer of It is commonly expected that as a person ages, their muscle mass decreases. To further examine this relationship in women, a nutritionist randomly selected 60 female patients from her clinic, 15 women from each 10-year age group beginning with age 40 and ending with age 80. For each patient, her age and current muscle mass was recorded. A scatterplot, least squares regression line, and coefficient of determination are as follows. 
-Write a sentence interpreting the value of the slope in the context of the study.
A) A one year increase in age is associated with a 1.19 lb increase in predicted muscle mass. 
B) A one year increase in age is associated with a 1.19 lb decrease in predicted muscle mass. 
C) A one year increase in muscle mass is associated with a 1.19 lb increase in predicted age. 
D) A one year increase in muscle mass is associated with a 1.19 lb decrease in predicted age.

It Is Commonly Expected That as a Person Ages, Their