STAT 201: INTRODUCTION TO BUSINESS STATISTICS
Section 3, Spring 2012-2013
SOLUTIONS TO HOMEWORK # 6
1)
H0: 25
HA: > 25
Given n = 40, x =26.4, =6;
a) z =
x 0
x 0 26.4 25
=
=
= 1.4757
std. err / n
6 / 4
STAT 201: INTRODUCTION TO BUSINESS STATISTICS
Section 3, Spring 2012-2013
SOLUTIONS TO HOMEWORK # 4
1) a) Using either the uploaded z-table or the NORMSDIST(z) function in excel we get
i) P(z 1.0) = 0
Wentian Su
Com270-007
Prof.Keewan
TO: Bob Morgan, Operations Department
FROM: Vince Sinclair, Design Department
DATE: May 27, 2010
SUBJECT: Proposal for Wheelchair-Lift Switch Covers
PURPOSE
The purpo
STAT 201: INTRODUCTION TO BUSINESS STATISTICS
Section 3, Spring 2012-2013
HOMEWORK # 6
(Due Wednesday, June 5th)
1) Consider the following hypothesis test:
H0: 25
HA: > 25
A sample of 40 provided a sa
STAT 201: INTRODUCTION TO BUSINESS STATISTICS
Section 3, Spring 2012-2013
SOLUTIONS TO HOMEWORK # 5
1) = 3.518, = 0.20
a) n = 30, x = 3.724. The sampling error is then, x - = 3.724 - 3.518 = 0.206.
b)
STAT 201: INTRODUCTION TO BUSINESS STATISTICS
Section 3, Spring 2012-2013
ADDITIONAL PRACTICE PROBLEMS FOR THE FINAL EXAM
1. Let X be a random variable, characterized by a normal distribution with mea
STAT 201: INTRODUCTION TO BUSINESS STATISTICS
Section 3, Spring 2012-2013
SOLUTIONS TO THE PRACTICE PROBLEMS FOR THE FINAL EXAM
1.
a. P(X < 1200) = P (Z < (1200-1000)/400) = P(Z < 0.5) = 0.6915
b. P (
24 April 20xx
Stuart Wolfe, M.D.
Vice President and Chair
Hahnemann University Hospital
Department of Nephrology
1505 Race Street, Suite 1610
Philadelphia, PA 19102
Dear Dr. Wolfe:
As you req