Homework 2 Solutions, Stat II 550.112, Fall 2012
Note: In this solutions we use the shorthand expression (a) to denote the area under the standard normal density from to a. So, for example, (1.96) = .
Fact Sheet for Exam 1 in 550.112.
Distributions of
Distribution of
X X
,
,
/ n S/ n
and
X 1 X 2 (1 2 )
Distributions of
Distributions of
Distribution of
2
1
2
+ n2
n1
2
n1 2
S
2
when appropriate.
whe
Homework 1, Stat II 550.112, Fall 2012
For condence intervals of the form [xsome number], recall from 550.111 that some number
is called the margin of error. For example, a condence interval [3.1 .3]
Homework 3, Stat II 550.112, Fall 2012
Note: Many of the problems in this homework are taken from the McClave and Sincich textbook
that was used in the rst half of the two-semester sequence 550.111-11
Homework 3, Stat II 550.112, Fall 2012
Note: Many of the problems in this homework are taken from the McClave and Sincich textbook
that was used in the rst half of the two-semester sequence 550.111-11
Homework 4 and Solutions, Stat II 550.112, Fall 2012
For Problems 1 and 2 recall the example from McClave and Sincich problem 10.68 on the paper
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EXAM 1 in 550.112, a list of some topics/keywords covered.
population, parameter, sample, statistic, inferential statistics
population mean, population variance, population standard deviation
sample m