Solution
Homework 1 Solution
1. (20 pts) Data were gathered for y = hours of sleep the previous day and x = hours of
studying the previous day for n = 116 college students. The fitted model is found to be
Estimated average sleep hours = 7.56 0.269 (Study
Homework 3 (October 15)
Please bring a hard copy of your homework to Wednesdays class on October 15th and submit it at the beginning
of the class. You could either type or write down your answers. Make sure your name is on it.
1.
(a) (10pts) A straight-li
Homework 2 Solution
1. (50pts) Data from n = 30 female college students are used to analyze a straight-line relationship
between y = left foot length (cm) and x = left forearm length (cm). A plot of the data with the
regression line superimposed follows.
Homework 5 Solution
1. Three different soil treatments are compared in an agricultural experiment. Each treatment is used in twenty
fields (60 fields in all). The response variable is y = crop yield. A useful predictor is X = crop yield in the field
last
Stat 462 Practice Exam 1 (Solution)
1. The plot below illustrates the relationship between Y = Muscle mass and X = Age for a
random sample of women aged 40 to 79.
(a) Write the simple linear regression model that relates Y to X in the population, includin
Lab Activity 2
Please finish this lab activity during the class time and submit in the drop box on Angel.
Note: Please paste/copy any plot and the part of Minitab output that is used to answer each
question.
Part 1. In this part we will learn how to use M
Stat 462 Practice Exam 2
Part 1. The following study relates Y = the selling price of a home to X1 = the logarithm of the square foot area of the
home, X2 = the number of bedrooms, and X3 = the size of the garage.
a.
Write down
the multiple regression mod
Stat 462 Practice Exam 1
1. The plot below illustrates the relationship between Y = Muscle mass and X = Age for a
random sample of women aged 40 to 79.
(a) Write the simple linear regression model that relates Y to X in the population, including
the assum
Lab Activity 0 (Solution)
You may want to include necessary figures from the output of MINITAB.
Part 1 (About Normal Distribution and Independence)
A. Human heights are usually normally distributed. Suppose adult female heights are on
average 65 inches (5
Lab Activity 2
Please finish this lab activity during the class time and submit in the drop box on Angel.
Note: Please include the necessary plot(s) or Minitab output that are used to answer
each part of the following question.
Part 1: In this part we wil
Lab 1
1. Open the dataset shoes size and height from the ANGEL page. We have 13 observations in
total.
A. (10pts) Find out the mean and variance of height and shoe size of this sample. What are they
measuring? You can do that by go to Stat>Basic Statistic
Lab Activity 0
0. Minatab warm-up
1. About Normal Distribution and Independence
A. Human heights are usually normally distributed. Suppose adult female heights are on
average 65 inches (5'5) with a standard deviation of 4 inches. Lets generate some data o
Homework 6 (Due December 10)
1. (20pts each) Data from n = 19 bears of varying ages are used to develop an equation for estimating
Y= weight from X = neck circumference. One of the observations has X = 10.5, Y = 140. Below
is a plot of the data and regres
Homework4(Dueon10/29/2014)
1.(20pts)Suppose that data for a y-variable and two x-variables are:
Y
6
5
10
12
14
18
X1
1
1
3
5
3
5
X2
1
2
1
1
2
2
X3 = X1X2
For the model, first fill in the table above and then determine what the forms of Y, X, , and
are in
Homework 2 (Due Sep 24)
Please bring a hard copy of your homework to class on Sep 24 th and submit it at the beginning of the class. You could
either type or write down your answers. Make sure your name is on it.
1. (50pts) Data from n = 30 female college
Homework 1 (Due Sep 17)
Please bring a hard copy of your homework to Fridays class on Sep 17 and submit it at the beginning of the class.
You could either type or write down your answers. Make sure your name is on it.
1. (20 pts) Data were gathered for y
Homework4Solution
1.(20pts)Suppose that data for a y-variable and two x-variables are:
Y
6
5
10
12
14
18
X1
1
1
3
5
3
5
X2
1
2
1
1
2
2
X3 = X1X2
1
2
3
5
6
10
Each cell worth 2pts
For the model, first fill in the table above and then determine what the for
Homework 5 (Due November 17)
1. Three different soil treatments are compared in an agricultural experiment. Each treatment is used in twenty
fields (60 fields in all). The response variable is y = crop yield. A useful predictor is X = crop yield in the fi
Homework 3 Solution
1. (a) (10pts) A straight-line model is used to describe the relationship between y = logarithm of
dry weight of wood in poplar trees and x = logarithm of tree diameter. Below are a histogram of
the residuals and a normal plot of the r
General Intuition
Best Subset Procedure
Sequential Model Selection
Chapter 7: Model Comparison and Selection
Methods
STAT462 Applied Regression Analysis, Chapter 7
Chapter 7: Model Comparison and Selection Methods
General Intuition
Best Subset Procedure
1
Name_
Stat 462 Exam 1 Solution
A calculator and one sheet of notes (both sides) are allowed but may NOT be shared with others.
Score_
1.
The researchers are interested in relation between handspan and height. They collected a dataset that
includes the hei
Name_
Stat 462 Exam 1
A calculator and one sheet of notes (both sides) are allowed but may NOT be shared with others.
Score_
1.
The researchers are interested in relation between handspan and height. They collected a dataset that
includes the heights (in
STAT462
Midterm 1
Descriptive Statistics
Descriptive Statistics: Midterm 1
Variable
N N* Mean SE Mean StDev Minimum
Median Midterm 1 63 0
89.87
2.21 17.57
90.00 93.00
Q3
Maximum
97.00 100.00
Q1
0.00
Stem and Leaf
Stem-and-leaf of Midterm 1 N = 63
Leaf Uni
Intuition
Building Logistic Regression Models
Chapter 9: Logistic Regression
STAT462 Applied Regression Analysis, Chapter 9
Chapter 9: Logistic Regression
Odds Ratios and Tests
Intuition
Building Logistic Regression Models
Odds Ratios and Tests
If some p