(d) What percentage of the variation in diastolic blood pressure can be explained by systolic blood pressure?(e) Find an equation of the least-squares regression line for systolic blood pressure and diastolic blood pressure.A blood pressure measurement consists of two numbers: the systolic pressure, which is the maximum pressure taken when the heart is contracting, and thediastolic pressure, which is the minimum pressure taken at the beginning of the heartbeat. Blood pressures taken at rest were measured, in millimeters, for asample of 15 adults. The following table presents the results.130116133112 107 110 105 157 154SystolicDiastolic13411511312311911887837777698876709175 71 74 66 103 94Below is a scatterplot of the data set.

From given data, X Y X*Y X*X Y*Y 134 87 11658 17956 7569 115 83 9545 13225 6889 113 77 8701…

(d) What percentage of the variation in diastolic blood pressure can be explained by systolic blood pressure? (e) Find an equation of the least-squares regression line for systolic blood pressure and diastolic blood pressure

(d) What percentage of the variation in diastolic blood pressure can be explained by systolic blood pressure? (e) Find an equation of the least-squares regression line for systolic blood pressure and diastolic blood pressure

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Correlation

Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

Linear Correlation

A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.

Regression Analysis

Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.

Question

(d) What percentage of the variation in diastolic blood pressure can be explained by systolic blood pressure?
(e) Find an equation of the least-squares regression line for systolic blood pressure and diastolic blood pressure.
A blood pressure measurement consists of two numbers: the systolic pressure, which is the maximum pressure taken when the heart is contracting, and the
diastolic pressure, which is the minimum pressure taken at the beginning of the heartbeat. Blood pressures taken at rest were measured, in millimeters, for a
sample of 15 adults. The following table presents the results.
130
116
133
112 107 110 105 157 154
Systolic
Diastolic
134
115
113
123
119
118
87
83
77
77
69
88
76
70
91
75 71 74 66 103 94
Below is a scatterplot of the data set.

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