Researchers collected data on the annual mortality rate (deaths per 100,000) for males in 20 large towns and the water hardness in terms of the calcium concentration (parts per million, ppm) in the drinking water. ..... b) Here isne regression analysis of mortality and calcium concentration. What is the regression equation? Dependent variable is: Mortality R-Squared =61.2% s= 63.877 Variable Intercept Calcium (ppm) Coefficient SE (Coeff) t-ratio P-value 1707.214 30.21 56.51 <0.0001 0.22 -5.21 <0.0001 - 1.147 c) Interpret the slope of this line in context. O A. For each additional point in Mortality, the model predicts an increase of 1.147 points in Calcium (ppm). ndol predicts a decrease of 1.147 points in Calcium (ppm).

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
icon
Concept explainers
Question
Researchers collected data on the annual mortality rate (deaths per 100,000) for males in 20 large towns and the water hardness in terms of the calcium concentration
(parts per million, ppm) in the drinking water.
b) Here is ne regression analysis of mortality and calcium concentration. What is the regression equation?
Dependent variable is: Mortality
R-Squared =61.2%
S=63.877
Variable
Intercept
Calcium (ppm)
SE (Coeff)
30.21
Coefficient
t-ratio
P-value
56.51
<0.0001
1707.214
0.22
-5.21
<0.0001
-1.147
%3D
c) Interpret the slope of this line in context.
O A. For each additional point in Mortality, the model predicts an increase of 1.147 points in Calcium (ppm).
OB. For each additional point in Mortality, the model predicts a decrease of 1.147 points in Calcium (ppm).
C. For each additional point in Calcium (ppm), the model predicts a decrease of 1.147 points in Mortality.
Transcribed Image Text:Researchers collected data on the annual mortality rate (deaths per 100,000) for males in 20 large towns and the water hardness in terms of the calcium concentration (parts per million, ppm) in the drinking water. b) Here is ne regression analysis of mortality and calcium concentration. What is the regression equation? Dependent variable is: Mortality R-Squared =61.2% S=63.877 Variable Intercept Calcium (ppm) SE (Coeff) 30.21 Coefficient t-ratio P-value 56.51 <0.0001 1707.214 0.22 -5.21 <0.0001 -1.147 %3D c) Interpret the slope of this line in context. O A. For each additional point in Mortality, the model predicts an increase of 1.147 points in Calcium (ppm). OB. For each additional point in Mortality, the model predicts a decrease of 1.147 points in Calcium (ppm). C. For each additional point in Calcium (ppm), the model predicts a decrease of 1.147 points in Mortality.
Researchers collected data on the annual mortality rate (deaths per 100,000) for males in 20 large towns and the water hardness in terms of the calcium concentration
(parts per million, ppm) in the drinking water.
a) The display to the right shows the relationship between mortality and calcium concentration for these towns. Describe what you see in this scatterplot, in context.
A. There is a fairly strong, negative, linear relationship between calcium concentration and mortality rate. Towns with
harder water tended to have lower mortality rates.
1741-
There is a fairly strong, negative, linear relationship between calcium concentration and mortality rate. Towns with
softer water tended to have lower mortality rates.
1363+
C. There is a fairly weak, positive relationship between calcium concentration and mortality rate. Towns with harder
water tended to have lower mortality rates.
24
229
Calcium (ppm)
b) Here is the regression analysis of mortality and calcium concentration. What is the regression equation?
Dependent variable is: Mortality
R-Squared=61.2%
t-ratio
P-value
s=63.877
Coefficient
SE (Coeff)
56.51
<0.0001
30.21
Variable
1707.214
ntercent
Mortality
Transcribed Image Text:Researchers collected data on the annual mortality rate (deaths per 100,000) for males in 20 large towns and the water hardness in terms of the calcium concentration (parts per million, ppm) in the drinking water. a) The display to the right shows the relationship between mortality and calcium concentration for these towns. Describe what you see in this scatterplot, in context. A. There is a fairly strong, negative, linear relationship between calcium concentration and mortality rate. Towns with harder water tended to have lower mortality rates. 1741- There is a fairly strong, negative, linear relationship between calcium concentration and mortality rate. Towns with softer water tended to have lower mortality rates. 1363+ C. There is a fairly weak, positive relationship between calcium concentration and mortality rate. Towns with harder water tended to have lower mortality rates. 24 229 Calcium (ppm) b) Here is the regression analysis of mortality and calcium concentration. What is the regression equation? Dependent variable is: Mortality R-Squared=61.2% t-ratio P-value s=63.877 Coefficient SE (Coeff) 56.51 <0.0001 30.21 Variable 1707.214 ntercent Mortality
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Correlation, Regression, and Association
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman