Statistics for Business
MATH 1140-06 Fall 2013
due date:
November 21, 2013
Homework 12
Problem 1. In a warehouse there are 10 large boxes of bolts. It is known that 9
boxes have a corruption rate of p
Practice for Exam 1.
The formula sheet for Exam 1 is at the Bottom of this document.
Letter Grades
We have the letter grades for a sample of 25 exams given to a population of 1000 students:
Grade = A,
Exam 1 Math 1140 9/20/13
Form A
Name_
Section _ Show all relevant work. There are 20 problems.
Round your answers to 4 decimal places, unless the answer naturally rounds off to fewer decimals
places.
Chapter 4
Random Variable- A variable that assumes numerical values associated with the random
outcomes of an experiment, where one numerical value is assigned to each sample point
Discrete Random Var
Population A set of units we are interested in studying
Sample- A subset of units of the populations
Statistical Inference An estimate or prediction of some other generalization about a population
bas
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,
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P(A B)=P(A) + P(B) P(A B)
P(A B)= (
t
)
x o
z
s
n
x 0
n
(
)
x
x z / 2
x z / 2 s
(
n
n
()
n
x z / 2
x z / 2 s
)
n
n
.
, n>30
(
)
s
s
.
x tn 1, / 2
n
n
x t
Disclaimer: The review problems that follow are intended for all of the statistic courses that I am
teaching this semester: Math 1110, Math 1140 and Math 1230. As such, the topics that are covered
are
Exam 2 Practice Problems for Math 1140
The formula sheet for Exam 2 is at the end. There is a right body table for the standard normal
distribution at the end.
Urn
We have an urn which contains 6 gree
Exam 2 Math 1140 10/7/13
Form A
Name_
Section _ Show all relevant work. There are 13 problems.
Round your answers to 4 decimal places, unless the answer naturally rounds off to fewer decimals
places.
Exam 3 Math 1140 11/11/13
Form A
Name_
Section _ Show all relevant work. Round your answers to 4 decimal places. Please do not
detach any pages from the exam. The free response questions are 10 points
Practice for Exam 1.
The formula sheet for Exam 1 is at the Bottom of this document.
Letter Grades
We have the letter grades for a sample of 25 exams given to a population of 1000 students:
Grade = A,