Intro to Statistics (MAT 1181) <- Courses <- Sean Forman <- You Are Here
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Spring 2002
Syllabus in HTML format
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This area contains information regarding the course.
I presented at the tech fair today
posted 1:08 PM
The final exam went well the average was 80%.
posted 1:04 PM
do the following problems: 10, 11, 12
posted 12:41 PM
Do assignment #6
posted 12:33 PM
We have an exam next week.
posted 12:11 PM
Do exercises from chapter 12.
posted 11:58 AM
Do problems 18-20. Next read section 6.
posted 11:46 AM
formulaslook at this
posted 11:42 AM
Do problems 6-10.
posted 11:39 AM
Today in class we discussed confidence intervals.
posted 11:35 AM
Today there was a question about z-scores.
posted 11:16 AM
formulasthis is the formula sheet
posted 11:14 AM
Assignment for today, Read the next chapter. We will have a quiz next class as well.
posted 11:10 AM
Assignment for today: Read Chapter 7
posted 11:07 AM
Archive of Previous Days
formulasThis will probably show up better than the PDF file that I previously had on there.
posted 10:01 AM
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Formula SheetI'm not sure this will show up right for you guys, but I did print it out and it will be allright for your use on the final.
posted 2:39 PM
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Class this weekWe will get through chapter 9 (specifically section 9.3). If you can do the homework that I assigned from chapter 9, you will be able to do the questions on the test from this chapter.
Please bring any questions related to the final that you might have on Thursday. I will also be accepting extra credit through Thursday, so don't leave it to the absolute last minute.
posted 3:21 PM
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Common project and makeup questionsTo determine if something is normal you need to
1) look at the histogram
2) look at the distribution of values (does it match the empirical rule)
3) is it skewed (are the median and mean close)Also when I say what is the probability of a gain of 350 or the probability of a 400 hitter. I mean 350 or higher and .400 and higher.
On the makeup exam, in problem 6, you are to compute the probabilities for the whole distribution. X values from 0 to 6.
posted 5:36 PM
Review Sheet #1
Review Sheet #2
Review Sheet Final
posted 2:49 PM
Example of an extra credit: Yahoo! Health News - Undiagnosed Asthma Common in High School AthletesThis is an example of an extra-credit for the article above.
A recent study led by Dr. Jack Becker of St. Christopher's Hospital for Children in Philadelphia studied how common asthma was among H.S. athletes and how often it was undiagnosed. The article was found on health.yahoo.com. This study is an observational study done using Pennsylvania high school athletes. The researchers were attempting to determine the percentage of athletes with undiagnosed asthma. The 801 students in the study were likely selected using a cluster sample. A couple of high schools were chosen and then all of the athletes in those schools were selected.
This result likely only relates to high school age students as they only considered a very narrow band of age.
The study also showed that response bias can be a problem in studies because the athletes may not answer the questions on a questionaire honestly because they fear some repurcussions if the fact they have asthma comes out.We can estimate the proportion of the population with undiagnosed asthma to a 95% confidence interval level. p=49/801 = .12. Then the 95% confidence interval will be (.12 - 1.96 * sqrt((.12)*(.88)/801), .12 + 1.96 * sqrt((.12)*(.88)/801)).
That's really all you need to do. That would be full five point effort.
posted 2:01 PM
Class TomorrowIn the late class we will finish chapter 8. In both classes, we will cover 9.1 and 9.2.
Homework for section 9.1/ 1, 3, 6
section 9.2/ 10, 11, 12abd, 13, 15, 17, 19,
posted 1:40 PM
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Class TodayI will hand back your tests today along with an exam makeup as the average score was only a 70. You can earn back 10 points on the exam if you answer the given questions correctly. It must be handed in on Thursday at class time and no late sheets will be accepted. NONE.
Projects are due on Thursday as well. Be sure to work on those.
We will also do course evaluations today.
For classwork, we will work on sampling distributions for proportions and probably have an in-class activity.
Homework for section 8.3/ 27, 28, 29, 31
posted 11:35 AM
Normal Approximation to BinomialAn applet that we will use in class today.
posted 10:55 AM
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Class TomorrowWe will finish up on the chapter seven. We want to be able to determine which range of values will contain 80%, 90%, etc. of the data when the data comes from a normal distribution.
Then we will start chapter 8. This will cover sampling distributions and will be one of the last few topics that we will cover. The main thing here is to understand the central limit test and to understand that the sampling distribution is centered around the population mean. You need to understand that as the sample size increases the distribution's width becomes smaller.
We will do several examples of this tomorrow.
posted 4:54 PM
Homework for Class on ThursdaySection 8.1 / 1, 2, 3, 9, 11, 13
Section 8.2 / 14, 15, 16, 17, 21
posted 12:06 PM
Class this weekWe took the exam on Monday. I hope to have those graded by Thursday and back to you then. The projects are going to be due a week from Thursday, so please keep those in mind.
We will begin chapter 8 on Thursday and we only have five more class periods, so please be aware that we need to hustle through these last few chapters.
posted 11:33 AM
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Class todayWe covered the normal distribution and went over how to calculate probabilities for that distribution. I also assigned some more homework.
Chapter 7) 63, 66, 67, 69, 70
For the test you will need to know how to compute probabilities, but you will not need to know how to work backward from the probabilities to the x* values, that you are asked to do in some of the questions. Basically you are responsible for what we did in class.
posted 4:15 PM
Archive of Previous Days
Class TomorrowWe will review for the exam, which will be on Monday and will be over chapters 5-7.
We will discuss normal distributions.
How do you recognize a normal distribution and how do you compute probabilities for the normal distribution.
We will start with the standard normal and then extend it to other normal distributions.
I will also hand out the assignment for the second project, which will be due on April 25th.
posted 11:35 AM
Saint Joseph's University: Press Releases -- RENOWNED SPORTS ECONOMIST TO DISCUSS THE ECONOMICS OF BASEBALL AT SAINT JOSEPH'SIf you go to this and write up a one-page paper on what was discussed, this could count as one of your extra credits.
posted 10:28 AM
stock_market.txtFor our next project
posted 10:26 AM
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Class todayWe discussed the binomial distribution today. You need to know three parameters to find the probabilities using the binomial distribution, n, x and pi.
For next time, you need to read 7.6 and also do problems 59 and 60. I will probably add more on Thursday.
posted 5:44 PM
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Class today and for next weekIn both class, I handed back the quizzes which were not good. Remember that things that are "OR" are to be added and things that are "AND" are to be multiplied if they are independent.
We finished 7.3 which was talking about probability distributions and then covered 7.4 which was on means of distributions. You can not compute the means for the continuous distributions, but can compute them for discrete probabilities. I will expect you to compute neither for the variance and standard deviation.
Different distributions can be combined and we discussed that as well.
We got into binomial distributions in the first class, but not in the second class. We will finish those on Monday and start 7.6 as well.
Homework for chapter 7) 9, 11, 12, 15, 21, 29, 33a, 35, 41, 43, 46, 51 Just do it!
Exam will be on April 15th
Final exam is May 10th from 2-4 in Mandeville Hall Room 111.
posted 4:04 PM
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Index of /~sforman/courses/filesIf you are having trouble locating the World95 file, I have uploaded it to here. You will need to right-click and save as in order to save it on a floppy or your hard drive for your use in the project.
posted 10:35 AM
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Class this weekI hope you had a good spring break.
WORK ON YOUR PROJECTS!
We will cover much of chapter 6 this week. We are behind, so we will likely need to move fairly quickly. I will expect you to do the following homework.
All from chapter 6/ 7, 9, 11, 15, 17, 19, 22, 25
posted 10:51 AM
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Class this WeekOn Monday, we discussed correlation and regression lines. The main issues with regression lines is that we are trying to find the best line that matches the data set. This will require that we minimize the sum of squared deviations between the regression line and the actual data.
Once we have the regression line, we can then make predictions about new data points and understand more clearly what the relationship is between the data.
I also handed out a project worksheet that will be due on the 25th of March. Don't leave it till the last minute. I will discuss that some more on Thursday.
Also on Thursday, we will have a quiz over 5.1-5.3. You should know what regression and correlation means. You should be familiar with what SPSS prints out when finding these values.
posted 2:03 PM
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