STAT 2120
Solution for Homework#2
Problem 1: In the following multiple-choice questions, please circle the correct answer.
1. The probability of a Type I error is denoted by:
1 a.
2 b. 1-
3 c.
4 d. 1-
2. A Type I error is committed if we make:
1 a. a co
STAT 2120
Elementary Statistical Methods II
Homework # 1
Due date: 8/31/10
Note: You must show enough work to make your method of solution clear. Numerical
answers alone will receive no credit.
Problem 1: Write the corresponding symbol for each of the fol
STAT 2120
Solution for Homework#3
Problem 1: In the following multiple-choice questions, please circle the correct answer.
2
2
1. Given the information: s1 4 , s2 6 , n1 15 , n2 25 , the number of degrees of
freedom that should be used in the pooled varia
STAT 2120
Elementary Statistical Methods II
Homework # 8
Due date: 11/2/10
Note: You must show enough work to make your method of solution
clear. Numerical answers alone will receive no credit.
1.
A regression analysis between weight (y in pounds) and hei
STAT 2120
Solutions of Homework # 5
Problem 1: In the following multiple-choice questions, please circle the correct answer.
1.
A professor of statistics in Michigan State University wants to determine whether
the average starting salaries among graduates
STAT 2120
Solutions of Homework # 7
Problem 1: In the following multiple-choice questions, please circle the correct answer.
1.
Why would you use the Tukey multiple comparison?
a. To test for normality
b. To test for homogeneity of variance
c. To test ind
STAT 2120
Elementary Statistical Methods II
Homework # 4
Due date: 02/09/10
Problem 1: In the following multiple-choice questions, please circle the correct answer. (2 points)
1.
A political analyst in Texas surveys a random sample of registered Democrats
Solutions of HW#6
1.
Why would you use the Tukey multiple comparisons?
a. To test for normality
b. To test for homogeneity of variance
c. To test independence of errors
d. To test for differences in pairwise means
2.
In one-way analysis of variance, if al
Description of Personal Profile Data
Class
Gender
Year
Height
Hair
Eye Color
Distance
Political
Obama
expected
TV
Sport
5=Soccer,
1= Morning, 2= Afternoon
1=Male, 2=Female
1= Freshman, 2=Sophomore, 3=Junior, 4=Senior, 5= Other
In inches
Color 1=Blonde, 2=
Solutions of HW#10
Problem 1: Use the data in the problem 17.4
a) Draw a scatter diagram with regression line of the data to determine whether a
linear regression model appears to be appropriate.
Matrix Plot of Major HR, Minor HR, Age, Years Pro
0
20
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