Brian Gill's
Home Page

Spring Schedule
Class Handouts
Syllabus
 
                             

Statistics for Business and Economics
BUS/MAT 2700

Welcome to the course pages for Brian Gill's Spring 2006 Business Statistics class!  

Instructor: Dr. Brian Gill
     Office: OMH 209
     E-mail: bgill@spu.edu
     Phone: 206-281-2954

Tentative Spring 2006 Office Hours:
     MWF: 9:00-9:30 & 12:30-1:20
     or any time my door is open
     or other times by appointment
I will not be on campus at all on Tuesday and Thursday due to research work at UW.

My Schedule

Quick Links:

Homework Assignments

Homework assignments are due at the start of class on the dates listed below.  Current assignments will be at the top of the list below, with old assignments listed below that from newest to oldest.

The final exam will be Tuesday, June 6 at 1:00.  The format of the exam will be very similar to the first two exams, consisting mostly of open response questions along with a few multiple choice.  Excel will be allowed for approximately half of the exam.  A sample final exam that I gave a few years ago is available along with answers to the exam.

Homework for Friday, June 2: Turn in the following exercises:
                    do the following together: 12.5, 12.17ac, 12.25, 12.43, 12.57
                    do the following together: 12.9, 12.21ac, 12.29, 12.47, 12.61
                    12.23, 12.24, 12.77

Homework for Wednesday, May 31: Turn in exercises 10.88, 10.90, 10.92, 10.99abd, 10.100abd, 11.34abc, and 11.35ac

Monday, May 22:  Exam #2.  Here are some sample questions for the exam, and answers for the computational sample questions.  Here is a copy of the formula sheet that you will be given during the exam.  You will also be provided with a copy of the normal distribution tables from the textbook.

Homework for Friday, May 19: Solutions

  • Read section 9.5

  • Turn in exercises 9.28, 9.46, 9.47, 9.55, 9.57, 9.58, 9.59, 9.61, 9.62, 9.69, 9.73, and 9.74.

Homework for Wednesday, May 17:  Solutions

  • Carefully read sections 9.1 through 9.4

  • Turn in exercises 9.13, 9.15, 9.16, 9.17, 9.18, and 9.19.

Homework for Monday, May 15:

  • Turn in exercises 8.4, 8.6, 8.7, 8.9, 8.10, 8.15, 8.16, 8.20, 8.22, 8.28, and 8.33.
    For exercises 8.7, 8.15, and 8.28, please show the details of how to do the computations of the confidence interval by hand (you can also check your answer using PHStat).  You may use PHStat for all other computations.

Homework for Wednesday, May 10:  Solutions

  • Turn in exercises 7.2, 7.5, 7.6, 7.7, 7.8, 7.16, 7.17, 7.19, and 7.22.

Homework for Monday, May 8:

  • Turn in your group project

  • Make sure that you have read sections 7.1 through 7.3 on sampling distributions.

Homework for Friday, May 5: Solutions

  • Turn in exercises 6.1, 6.4, 6.8, 6.11, 6.13, 6.17, and 6.22.  For the last two exercises (6.17 and 6.22), please ignore the directions in the book.  Instead, please decide whether the data appear to be approximately normal by (1) constructing normal probability plots, and (2) constructing box-and-whisker plots.  (For 6.17, construct separate graphs for each office.)

Homework for Monday, May 1:  Solutions

  • Turn in exercises 5.3, 5.4, 5.5, 5.10, 5.11, and 5.15.  You should do 5.4 by hand, showing all details of your computations in a table like Table 5.3 at the top of p. 157.  You may use Excel for all other exercises. 

  • In addition, for each of the following scenarios, decide whether or not it is appropriate to treat X as a binomial random variable.  If it is, briefly explain why each of the 4 assumptions from class holds.  If it is not binomial, clearly explain which assumption fails.

  1. You look at a random sample of 50 births from a local hospital from the last year.  Let X = the number of boys among the 50 babies.

  2. A couple decides to continue to have children until their first girl is born.  Let X = total number of children the couple has.

  3. You want to know what percent of married people believe that mothers of young children should not be employed outside the home.  You plan to interview 50 people, and for the sake of convenience you decide to interview both the husband and the wife in 25 married couples.  Let X = the number of people among the 50 interviewed who think mothers should never be employed.

  4. An auto manufacturer chooses one car from each hour's production for a detailed quality inspection.  Let X = the number of finish defects (dimples, ripples, etc.) in the car's paint.

  5. The pool of potential jurors for a murder trial consists of 100 people chosen at random from the adult residents of a large city.  Each person in the pool is asked whether he or she opposes the death penalty.  Let X = the number who say "yes".

Homework for Friday, April 26:  Nothing will be collected.  However, please read sections 6.1, 6.2, and 6.3.

Homework for Wednesday, April 26:

  • Read Sections 7.4, 7.5, and 5.1.  Also look at Section 5.2, but focus only on p. 158 and pages 162-163.  We'll skip the computational details on p. 159-161 and p. 164 and just use Excel to do the computations.

  • Turn in the exercises from the handout given out in class on Monday (which includes 3 exercises not from the book plus exercises 7.56, 7.57, and 7.34 from the textbook)  Solutions

Homework for Wednesday, April 19:  Solutions

  • Turn in exercises 1, 2, 3, 4, and 5 from the homework sheet given out at the end of class on Monday.  (Skip exercise 6)

  • For extra credit, also turn in exercise 7. 

Homework for Monday, April 17:  Solutions

  • Turn in exercises 3.7 and 3.35, 3.8, 3.14 and 3.31, 3.15, 3.16 and 3.36.  Please note the following additional instructions:

    • Note that exercises from sections 3.1 and 3.3 are grouped together -- they use the same sets of data and should be done together.

    • On 3.7 and 3.35, note that we did the computations for "burgers" in class.  Please do the computations for "chicken" by hand and turn in the details of your computations (do NOT use Excel at all for this exercise, but a calculator is fine)

    • On part (a) of 3.8, explain what shape you would EXPECT this distribution to have (and why).  You don't have any data to look at, so this is based purely on your understanding, not on looking at a graph of computations.

    • For the remaining exercises, use Excel as needed for computations and graphs.

  • Also turn in exercises 3.23 and 3.26 (use Excel as needed for both of these)

No Class on Friday, April 14

Homework for Wednesday, April 12:

  • Nothing will be collected, but please make sure that you have read sections 3.1, 3.2, 3.3, and 3.5 from the textbook (skip 3.4).  You can also get started on the HW for next week.

Homework for Monday, April 10: Solutions

  • Read Section 3.1

  • Turn in exercises 2.28, 2.31, 2.33, 2.49, 2.50, and 2.51.  Note the additional instructions below:

    • for 2.28, do not use Excel; create the tables & graphs by hand

    • use Excel to create the graphs for 2.31 and 2.33

    • for the last 3 exercises, when you redraw the graph, you can either do it by hand or use Excel, whichever you prefer.

Homework for Friday, April 7:

  • Read sections 2.3, 2.4, and 2.6.  you can skip 2.2 and 2.5 (for now).

  • Turn in the following two exercises:

    •  The price-to-earnings ratio for a sample of 50 companies whose stocks are traded on the New York Stock Exchange range from 5.2 to 63.4.  Suppose that you want to create a frequency distribution with six class groupings (6 "bins"). 
      What would be a good value to use as a starting point for the first bin? 
      What would be a good value for the ending point of the last bin? 
      How wide would each bin be? 
      List the six class groupings that you would use. 
      What would the midpoint of each class be?

    • A random sample of 50 executive vice presidents is selected from various public universities in the U.S., and the annual salaries of these officials are obtained.  The salaries range from $62,000 to $247,000.  Set up the class boundaries (the "bins") for a frequency distribution (a) if 5 class intervals are used; (b) if 6 class intervals are used; (c) if 8 class intervals are used; and (d) if 10 class intervals are used.

  • Turn in exercises 2.21, 2.23, 2.26, and 2.27 from section 2.3.  You will need Excel for all but the first exercise.  Please turn in printouts of the graphs requested in the exercises.

  • I didn't previously specifically tell you what to read from the book -- if you haven't read Chapter 1 and Section 2.1 (from which the first two assignments were taken), read them!

Homework for Monday, April 3: 

  • Turn in exercises 2.3, 2.7, and 2.10.  For exercise 2.7, also construct a Pareto diagram.  Also for 2.7, which items represent the "vital few" and which represent the "trivial many"?
    For all three exercises, use Excel to create your graphs.  Copy them into Word and turn in a printout of all of the graphs.

  • Complete and turn in the Survey of Attitudes Toward Statistics

Homework for Friday, March 31:

  • Turn in exercises 1.4, 1.5, 1.7, 1.9, 1.25, 1.26, and 1.27 from the textbook.  Solutions

 

Send questions or comments to Brian Gill or call (206) 281-2954.
Copyright © 2006 Seattle Pacific University.

Mathematics Department
Seattle Pacific University
3307 Third Avenue West
Seattle, Washington 98119-1997
United States of America