Imagine a regression line that relates average systolic blood pressure to a pers
ID: 2907980 • Letter: I
Question
Imagine a regression line that relates average systolic blood pressure to a person's age. For this setting let the average systolic blood pressure play the role of the response variable. The average blood pressure for people 26 years old is 92, while for those 44 years old the average is 108.
Recall from high school that the slope is "rise" over "run". Since this is a two-point line your model will fit perfectly (r = 1).
(a) What is the slope of the regression line?
(Round the answer to two decimal places.)
(b) What is the intercept of the regression line?
(Round the answer to two decimal places.)
(c) What is the estimated average systolic blood pressure for people who are 36 years old?
(Round the answer to one decimal place.)
Explanation / Answer
given average systolic blood pressure to a person's age
systolic blood pressure=y
age=x
In excel install analysis tool pack.
Goto data >data analysis >Regression
Select X range and Y rage.Click Ok.
we get below output:
y=68.89+0.89x
predicted systolic blood pressure=68.89+0.89*age
SolutionA:
slope=0.89
SolutionB:
y intercept=68.89
Solutionc:
we have regression eq
predicted systolic blood pressure=68.89+0.89*age
predicted systolic blood pressure=68.89+0.89*36
=100.93
ANSWER:100.9
Coefficients Intercept 68.88888889 x 0.888888889