Bundle: Understandable Statistics, Loose-leaf Version, 12th + WebAssign Printed Access Card for Brase/Brase's Understandable Statistics: Concepts and Methods, 12th Edition, Single-Term

12th Edition

ISBN: 9781337605182

Author: Charles Henry Brase, Corrinne Pellillo Brase

Publisher: Cengage Learning

See similar textbooks

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 p…

Videos

Textbook Question

Chapter 9.4, Problem 3P

For Problems 3-6, use appropriate multiple regression software of your choice and enter the data. Note that the data are also available for download at the Companion Sites for this text.

3. Medical: Blood Pressure The systolic blood pressure of individuals is thought to be related to both age and weight. For a random sample of 11 men, the following data were obtained:

Chapter 9.4, Problem 3P, For Problems 3-6, use appropriate multiple regression software of your choice and enter the data.

(a) Generate summary statistics, including the mean and standard deviation of each variable. Compute the coefficient of variation (see Section 3.2) for each variable. Relative to its mean, which variable has the greatest spread of data values? Which variable has the smallest spread of data values relative to its mean?
(b) For each pair of variables, generate the sample correlation coefficient r. Compute the corresponding coefficient of determination r². Which variable (other than x₁) has the greatest influence (by itself) on x₁? Would you say that both variables x₂ and x₃ show a strong influence on x₁? Explain your answer. What percent of the variation in x₁ can be explained by the corresponding variation in x₂? Answer the same question for x₃.
(c) Perform a regression analysis with x₁ as the response variable. Use x₂ and x₃ as explanatory variables. Look at the coefficient of multiple determination. What percentage of the variation in x₁ can be explained by the corresponding variations in x₃ and x₃ taken together?
(d) Look at the coefficients of the regression equation. Write out the regression equation. Explain how each coefficient can be thought of as a slope. If age were held fixed, but a person put on 10 pounds, what would you expect for the corresponding change in systolic blood pressure? If a person kept the same weight but got 10 years older, what would you expect for the corresponding change in systolic blood pressure?
(e) Test each coefficient to determine if it is zero or not zero. Use level of significance 5%. Why would the outcome of each test help us determine whether or not a given variable should be used in the regression model?
(f) Find a 90% confidence interval for each coefficient.
(g) Suppose Michael is 68 years old and weighs 192 pounds. Predict his systolic blood pressure, and find a 90% confidence range for your prediction (if your software produces prediction intervals).

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 9.4, Problem 2P

Chapter 9.4, Problem 4P

Students have asked these similar questions

Question 2 The data below provides the battery life of thirty eight (38) motorcycle batteries. 100 83 83 105 110 81 114 99 101 105 78 115 74 96 106 89 94 81 106 91 93 86 79 103 94 108 113 100 117 120 77 93 93 85 76 89 78 88 680 a. Test the hypothesis that mean battery life is greater than 90. Use the 1% level of significance. b. Determine if the mean battery life is different from 80. Use the 10% level of significance. Show all steps for the hypothesis test c. Would your conlcusion in part (b) change at the 5% level of significance? | d. Confirm test results in part (b) using JASP. Note: All JASP input files and output tables should be provided

Suppose that 80% of athletes at a certain college graduate. You randomly select eight athletes. What’s the chance that at most 7 of them graduate?

Suppose that you flip a fair coin four times. What’s the chance of getting at least one head?

Chapter 9 Solutions

Bundle: Understandable Statistics, Loose-leaf Version, 12th + WebAssign Printed Access Card for Brase/Brase's Understandable Statistics: Concepts and Methods, 12th Edition, Single-Term

Ch. 9.1 - Statistical Literacy When drawing a scatter...Ch. 9.1 - Prob. 2P Ch. 9.1 - Prob. 3P Ch. 9.1 - Prob. 4P Ch. 9.1 - Prob. 5P Ch. 9.1 - Prob. 6P Ch. 9.1 - Prob. 7P Ch. 9.1 - Prob. 8P Ch. 9.1 - Prob. 9P Ch. 9.1 - Critical Thinking: Lurking Variables Over the past...

Ch. 9.1 - Prob. 11P Ch. 9.1 - Prob. 12P Ch. 9.1 - Prob. 13P Ch. 9.1 - Health Insurance: Administrative Cost The...Ch. 9.1 - Prob. 15P Ch. 9.1 - Geology: Earthquakes Is the magnitude of an...Ch. 9.1 - Prob. 17P Ch. 9.1 - Prob. 18P Ch. 9.1 - Prob. 19P Ch. 9.1 - Prob. 20P Ch. 9.1 - Prob. 21P Ch. 9.1 - Prob. 22P Ch. 9.1 - Prob. 23P Ch. 9.1 - Prob. 24P Ch. 9.2 - Statistical Literacy In the least-squares line...Ch. 9.2 - Prob. 2P Ch. 9.2 - Critical Thinking When we use a least-squares line...Ch. 9.2 - Prob. 4P Ch. 9.2 - Prob. 5P Ch. 9.2 - Critical Thinking: Interpreting Computer Printouts...Ch. 9.2 - Prob. 7P Ch. 9.2 - For Problems 718, please do the following. (a)...Ch. 9.2 - Prob. 9P Ch. 9.2 - For Problems 718, please do the following. (a)...Ch. 9.2 - Prob. 11P Ch. 9.2 - Prob. 12P Ch. 9.2 - For Problems 718, please do the following. (a)...Ch. 9.2 - Prob. 14P Ch. 9.2 - Prob. 15P Ch. 9.2 - For Problems 718, please do the following. (a)...Ch. 9.2 - Prob. 17P Ch. 9.2 - Prob. 18P Ch. 9.2 - Prob. 19P Ch. 9.2 - Residual Plot: Miles per Gallon Consider the data...Ch. 9.2 - Prob. 21P Ch. 9.2 - Prob. 22P Ch. 9.2 - Prob. 23P Ch. 9.2 - Prob. 24P Ch. 9.2 - Prob. 25P Ch. 9.3 - Prob. 1P Ch. 9.3 - Prob. 2P Ch. 9.3 - Prob. 3P Ch. 9.3 - Prob. 4P Ch. 9.3 - Prob. 5P Ch. 9.3 - Prob. 6P Ch. 9.3 - Prob. 7P Ch. 9.3 - In Problems 712, parts (a) and (b) relate to...Ch. 9.3 - Prob. 9P Ch. 9.3 - Prob. 10P Ch. 9.3 - In Problems 712, parts (a) and (b) relate to...Ch. 9.3 - Prob. 12P Ch. 9.3 - Prob. 13P Ch. 9.3 - Prob. 14P Ch. 9.3 - Prob. 15P Ch. 9.3 - Expand Your Knowledge: Time Series and Serial...Ch. 9.3 - Prob. 17P Ch. 9.4 - Statistical Literacy Given the linear regression...Ch. 9.4 - Prob. 2P Ch. 9.4 - For Problems 3-6, use appropriate multiple...Ch. 9.4 - For Problems 3-6, use appropriate multiple...Ch. 9.4 - Prob. 5P Ch. 9.4 - Prob. 6P Ch. 9 - Prob. 1CRP Ch. 9 - Prob. 2CRP Ch. 9 - Prob. 3CRP Ch. 9 - Prob. 4CRP Ch. 9 - Prob. 5CRP Ch. 9 - Prob. 6CRP Ch. 9 - Prob. 7CRP Ch. 9 - Prob. 8CRP Ch. 9 - Prob. 9CRP Ch. 9 - Prob. 10CRP Ch. 9 - Prob. 1DH Ch. 9 - Prob. 1LC Ch. 9 - Prob. 1UT Ch. 9 - Prob. 2UT Ch. 9 - Prob. 3UT Ch. 9 - Prob. 4UT Ch. 9 - Prob. 5UT Ch. 9 - Prob. 6UT Ch. 9 - Prob. 7UT Ch. 9 - In Problems 16, please use the following steps (i)...Ch. 9 - Prob. 2CURP Ch. 9 - Prob. 3CURP Ch. 9 - Prob. 4CURP Ch. 9 - Prob. 5CURP Ch. 9 - Prob. 6CURP Ch. 9 - Prob. 8CURP Ch. 9 - Linear Regression: Blood Glucose Let x be a random...

Knowledge Booster

$Statistics$

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.

Solution Summary: The author explains how to obtain summary statistics using MINITAB software.

Concept explainers

Videos

Want to see the full answer?

Chapter 9 Solutions