STAT 2010, Elements of Statistics for Business and Economics, Spring 2006

HW and Announcement (Usually due in a week)

1, 2

Statistics, population, parameter, sample, statistic, variable, histogram, scatter diagrams

Student Center for Academic Achievement is a a great resource to consider if you find the material covered in class difficult. In addition to my office hours, you might consider taking advantage of it to improve your performance in the course.

Two copies of "Statistics for Management and Economics" on two-hour reserve in the Library. The books will be available to check out starting next Monday (possibly this Friday).

HW #1: Do the following exercises in the textbook:
Exercises 1.3, 4
Exercises 2.2, 3
Ex. 2.11
Ex 2.33, 35(a)(c)
Ex. 2.55, 56
Ex 2.73
Ex.4.3
Due next Tue (4/4)

HW #1 Grades: "For 2010 HW#1, please grade only 1.4 and 4.3. For this time, give
subproblems 1.4(a)-(g) and 4.3(b) 1 point each. Give 4.3(a) 3 points.
The total points would be 7+(3+1)=11."

HW #2: Do the following exercises in the textbook:
Ex 4.23, 24((b) and (c) only; also compute standard deviations as well), 27, 28
Ex 4.37, 4.43, 4.48 (do only "describe your findings" part; the boxplot is provided in the handout; feel free to try Minitab to draw the boxplot per in class instruction but it's not required)
Ex 4.55, 56
(Due next Tue 4/11)

HW #2 Grades: 3 points each for:
4.24 (b) and standard deviation
4.27 (a)
4.28 (a)
4.37 Third quartile part
4.56

Note on computer use for HW: You won't be allowed to use computers in tests so doing HW by hand with a calculator is a good way to practice for tests; but feel free to use computers to check your answer but don't forget to show your work on the HW to get points

Minitab is downloadable (75 MB) from my website. Follow the link in the Blackboard Announcement.

HW #3: Do the following exercises in the textbook:
Ex 4.58 (xr04-58; computer use is OK but show your work)
Ex 5.1
Ex 5.17
Ex. 6.8
Ex. 6.86
Ex. 7.1(d), 2(d), 7
Optional (won't be graded): Ex 4.84, 4.86 (you have to use the computer, preferrably Minitab, for these two problems)
(Due next Tue 4/18)

HW #3 Grades:3 points each for:
Ex 4.58 (c)
Ex 5.17 (a)
Ex. 6.86 (b)
Ex. 7.7 (b) only (i) P(X <= 2) = .74

probability, outcome, sample space, event, joint probability, marginal probability, conditional probability,

random variable, discrete probability distribution, continuous probability distribution, expected value E(X), binomial distribution, Poisson distribution,

Quiz moved to Thursday (4/20)!
Quiz on Tuesday (4/18):
Quiz will cover chapters 1-4; It's closed book and closed note, but a single two-sided notes are allowed. See the syllabus for details

HW #4: Do the following exercises in the textbook:
Ex. 7.19(a)(d), 39 (in answering 7.39, use the fact that answers to 7.38 is E(X) =4.00 and V(X) = 2.40)
Ex. (7.55 Optional)
Ex. 7.81, 82, (83 and 89 are optional), 91
Ex. 8.1 (freebie; in class)
Ex. 8.20-26, 31, 38-39
No need to turn in HW #4. in. But doing them would be a good practice for the midterm. HW #4 solutions will be posted on the blackboard later this week.
(Due next Tue 2/25)

Midterm on Thursday (4/27)
Midterm covers Chapters 1-7.3 (binomial distribution)

Part of Tuesday will be a review session for the Midterm

midterm problems (pdf)

midterm solutions (pdf)

HW #5: Do the following exercises in the textbook:
Ex. 8.27, 33, 50
Ex. 8.83
Due next Tue (5/9)

Important Announcement:

- The non-standardized test part of the final (25% of the total grade) will be given in the last week, on Thu. 6/1/06 9:40 ~ 11:40 AM;
It covers Ch. 8 ~ End;
Usual one, double-sided cheat sheet is allowed

- The standardized test part of the final (20% of the total grade) will be given on the official final day. 6/8/06 8:00 ~ 9:50 AM;
It is comprehensive;
No need for cheat-sheet (you will be given a formula sheet))
Need "Assessment form" (can get from campus bookstore)

sampling distribution of {the mean, the proportion, the difference between two means}, estimation, confidence interval (CI), confidence level

HW #6: Do the following exercises in the textbook:
Ex. 9.5, 6, 7(a)(b), 15, (10, 11, 16 are optional)
Ex. 10.9, 10, 11, 21
No need to submit; the solutions will be posted on Wed (tomorrow). We will discuss solutions on Thu class.

hypothesis testing, {null, alternative} hypothesis, type I error, type II error, test statistic, rejection region, critical value, significance level, P-value

Quiz #2 (Tuesday 05/16) covers Chapters 8 ~ Ch 10, section 2 (confidence interval for population mean when sigma is known)

No class on Thursday (5/18) : I will be away for a conference. Extra assignments will be given.

Summary Lecture Slides (pdf)

- Reading assignment: Chapter 12 of the textbook, especially sections 12.1 and 12.3. I also uploaded latest lecture notes.

- HW #7: Do the following exercises in the textbook:
Ex. 11.7~9, 28 (use that x-bar = 11.00),
32 (use that x-bar = 6.60),
33 (use that x-bar = .493);
Ex. 12.1(a)(d), 2(d), 3(d), 4(d), 8(a), 13(a)(b),
21 (use that x-bar = 5.69 and s = 1.58),
22 (use that x-bar = 24,051 and s = 17,386),
23 (use that x-bar = 20.85 and s = 6.76),
31 (use that x-bar = 63.70 and s = 18.94)
Due next Tue 5/23
(Some of the problems can be done only after you finish the reading assignment. For this time, I will only record who submitted and who didn't instead of grading individual problems. )

Quiz #2 solutions (pdf)

HW #8: Do the following exercises in the textbook:
Ex. 12.54, 58, 66
Ex. 13.1a, 2a, 3a, 5b, 7
Ex. 13.40
Ex. 13.73
Ex. 17.1*, 2* (Use the following pre-computed statistics:)
Advertising: n=12, sample mean=51.08, sample SD=27.38
Sales: n=12, sample mean=12.075, sample SD=2.047
Correlation = 0.779
Covariance = 43.66
Ex. 17.22*
Due next Tue (5/30) (Again, I will only record who submitted and who didn't instead of grading individual problems. So do only those problems you could do. Ch. 17 materials related to questions with * marks will be covered next Tuesday.)

Non-standardizd Final (Thursday; covers Chapters 8 ~ End)

HW #9: Do the following exercises in the textbook:
Ex. 9.30(a), 34
Ex 9.45
Ex. 10.41, 42, 51
No need to turn it in. Solutions will be posted on the blackboard today.

Standardized Final: Thursday (6/8/06 8:00 am to 9:50 am)

Students can purchase Assist forms at the CSUEB Bookstore for 50 cents

INSTRUCTIONS FOR COMPLETING ASSIST FORMS:

1. Students should enter as much of their names as possible in the "Your Last Name" boxes.

2. The two letters of their Net ID are entered in the "First Initial"
and "Middle Initial" boxes on that same line.

3. The four digits of their Net ID should be entered in the first four
boxes of the "Social Security Number" section.

Final: Thursday, 6/8/2006, 8:00 am to 9:50 am

See Final schedule