C22.0103
Spring 2011
Homework 7 solutions
1. Based on a sample of 50 x-values having mean 35.36 and standard deviation 4.26, find
a 95% confidence interval for the population mean.
SOLUTION: The 95% confidence interval for the population mean is x t0.025;

STAT-UB.0103
Sample Final Exam Problems
Here are problems used on the final exams in previous versions of the course. These are
identified as A, B, C, D, E, and F. Some sequence numbers are missing; these
correspond to topics that were moved to other cour

STAT-UB.0103
SPRING 2012
Homework Set 4
Solutions
1. If Z is a standard normal random variable, find the probability that
a.
0 Z 1.24
d.
-0.88 < Z < 0.14
b.
Z > -0.45
e.
-1.13 < Z -0.92
c.
| Z | 0.80
f.
| Z | 0.70
SOLUTION:
In all problems involving the n

STAT-UB.0103
Spring 2012
Homework Set 8
Solutions
1. Curtis was investigating the properties of a new vacuum cleaner motor in terms of a
standardized lab procedure. In this procedure, the motor was applied to a pile of gypsum
powder for five seconds, and

STAT-UB.0103
Spring 2012
Homework 6
Solutions
1. The data file M\MONET.MTP gives information on 430 paintings by Claude Monet.
Yes, Monet was a busy painter. Suppose that youd like to consider the relationship
between price at auction (C27) and size of pa

C22.0103 SPRING 2012 Homework Set 5 Solutions
1. The value of a certain asset is currently at $50,000. The proportional weekly changes
in value have been modeled as lognormal with = 0.0024 and = 0.0044. (This means
P
that log t is assumed to be normally d

C22.0103
Homework Set 3
Spring 2012 Solutions
1. The file CDCLifeTable is available from the course web site. Its in the M folder;
the direct link is
http:/people.stern.nyu.edu/gsimon/statdata/B01.1305/M/index.htm
This has data for non-Hispanic whites, wi

C22.0103
Homework Set 2
Spring 2012
Solutions
mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
1. MBS11, problem 3.18, page 129.
SOLUTION: If there are eight players, there are eight possibilities for the first-place
person and, thereafter, seven for the second-place

C22.0103
Spring 2012
Homework Set 1
Solutions
Homework assignments will be drawn from problems from the text, as well as from other
sources. Some of these will involve data files. All files will be available on the Web site
www.stern.nyu.edu/~gsimon/statd