Business Statistics, Fall 2008
1. The ages of people in a class (to the nearest year) are as follows:
Age
Number of students
18
14
19 20
120 200
21 22 23
200 90 30
24 25
10 2
32
1
What is true about t
36(70)-207: Homework Set 4
DUE: Friday, Sept. 25 at the beginning of the class
Please make sure you write full solutions that show your work.
Reading: Chapter 4 in book
Lecture notes
Hand-In Problems:
Homework Set 5, SOLUTIONS
Statistics 36(70)-207
October 2, 2009
(1)
Consider the following lottery game: You bet a dollar on a number between 0 and 9 that you
pick at random. If you are correct, you w
36(70)-207: Homework Set 5
DUE: Friday, Oct 2 at the beginning of the class
Please make sure you write full solutions that show your work (step-by-step
calculations with brief explanations, for exampl
Homework Set 6, SOLUTIONS
Statistics 36(70)-207
October 14, 2009
(1) Chapter 5 exercise 74 (p. 349)
Let PP denote the event that a plant is most protable, and let CP denote the event that a
contract i
36(70)-207: Homework Set 6
DUE: Wednesday, Oct 14 at the beginning of the class
Please make sure you write full solutions that show your work (step-by-step
calculations with brief explanations)
Readin
Homework Set 7, SOLUTIONS
Statistics 36(70)-207
October 23, 2009
(1) Chapter 6 exercise 18 (p. 375)
The bottom row of Table D shows that the critical z-value z is 1.96. The problem states the
standard
36(70)-207: Homework Set 7
DUE: Friday, Oct 23 at the beginning of the class
Reading: Chapter 6.1 + Lecture notes + Handouts
Hand-In Problems:
(1) Chapter 6 exercise 18 (p. 375)
(2) Chapter 6 exercise
Homework Set 8, SOLUTIONS
Statistics 36(70)-207
October 30, 2009
(1) Chapter 6 exercise 46 (p. 389)
Let sof tware denote the mean of all numbers produced by the software. We need to test the
null hypo
Homework Set 9, SOLUTIONS
Statistics 36(70)-207
November 6, 2009
(1) Chapter 6 exercise 54 (p. 394)
(a) They have the null and alternative backwards. If is the average level of improvement, the
null h
Homework Set 10, SOLUTIONS
Statistics 36(70)-207
November 6, 2009
(1) Here we show that the expectation of the sample mean is the mean of the population:
1
E (X ) = E (
n
n
i=1
1
Xi ) = E (
n
n
i=1
1
36(70)-207: Homework Set 10
DUE: Monday, Nov 23 at the beginning of the class
Reading: Chapter 7 + Chapter 8.1 + Lecture notes
Hand-In Problems:
(1) Let X1 , X2 , . . . , Xn be independent and identic
Homework Set 11, SOLUTIONS
Statistics 36(70)-207
December 4, 2009
(1) Chapter 8 exercise 68 (p. 522-523)
(a) Let pm denote the population proportion of males students employed, and let pw denote the
p
Homework Set 4, SOLUTIONS
Statistics 36(70)-207
September 25, 2009
(1) Chapter 4 exercise 52 (p. 274)
The expected value, or the mean, is given by
X = (1 0.25) + (2 0.32) + (3 0.17) + (4 0.15) + (5 0.
36(70)-207: Homework Set 3
DUE: Friday, Sept. 18 at the beginning of the class
Please make sure you write full solutions that show your work.
Reading: Sections 2.1-2.4 and 4.1-4.2 in book
Lecture note
Homework
Homework, due Sunday June 2
Q11: Consider the following quantitative variables:
X= 0, 1, 2, 3, 4, 5, 6
Y= 0.94, 2.09, 8.39, 8.27, 10.94, 15.93, 22.14
Produce a scatterplot. Calculate the cor
Summer 2013 - QUIZ 1 - Solutions
Directions:
This quiz is closed book, closed notes, and closed mouth. If you have any questions,
please see the instructor. You may use a calculator.
A sample of 8 sal
36-201 - Summer 2013 - QUIZ 2 - Solutions
Name:
Directions:
This quiz is closed book, closed notes, and closed mouth. If you have any questions,
please see the instructor. You may use a calculator.
0
36-207 - Summer 2013 - QUIZ 2 - Solutions
Name:
Directions:
This quiz is closed book, closed notes, and closed mouth. If you have any questions,
please see the instructor. You may use a calculator.
1.
36-201 - Summer 2013 - QUIZ 3
Name:
Directions:
This quiz is closed book, closed notes, and closed mouth. If you have any questions,
please see the instructor. You may use a calculator.
1. (5 pts) In
36-207 - Summer 2013 - QUIZ 3
Name:
Directions:
This quiz is closed book, closed notes, and closed mouth. If you have any questions,
please see the instructor. You may use a calculator.
1. (5 pts) In
36-201 - Summer 2013 - QUIZ 4
Directions:
If you have any questions, please see the instructor. One page of notes is permitted.
You may use a calculator.
1. (30) In the following situations, determine
36-207 - Summer 2013 - QUIZ 4
Name:
Directions:
If you have any questions, please see the instructor. One page of notes is permitted.
You may use a calculator.
1. (30) In the following situations, det
36-201 - Summer 2013 - QUIZ 5
SOLUTIONS
Directions:
If you have any questions, please see the instructor. One page of notes is permitted.
You may use a calculator.
1. (35) A company is studying the mo
36-207 - Summer 2013 - QUIZ 5
SOLUTIONS
Directions:
If you have any questions, please see the instructor. One page of notes is permitted.
You may use a calculator.
1. (35) The number of freshmen at CM
Homework Set 1, SOLUTIONS
Statistics 36(70)-207
September 4, 2009
(1) 1.14, p. 22
a) See graph (a) below.
b) See graph (b) below.
c) The bar graph in part (b) is called a Pareto bar graph. The Pareto
36(70)-207: Homework Set 1
DUE: Friday, Sept. 4 at the beginning of the class
Reading: Chapters 1.1-1.2 + pp.50-54 in book
Lecture handouts
Chapter 1 Appendix (on Minitab)
Hand-In Problems:
(1) Chapte