# assignments

## Eleven

### due Tuesday April 26

• Do #19 and #20 in section 10-3
• Do #19 and #20 in section 10-4
• Do #1 in Data Analysis, pg 543
• Work on your project
• last test sometime near the 28th

## Ten

### due Tuesday April 19

• Read chapter 10, on correlation and regression
• No written assignment this week - work on your projects.

## Nine

### due Tuesday April 12

• two-way anova, pg 600-608
• more 2-way reading online; see chapter 16 in Vassar stat text
• Note that in Excel, this is "Anova: 2 factor with replication". Excel expects that the selected rectangle includes labels i.e. A=1, B=1, etc. in the following 3x3 example with 2 rows per sample. In other words, in the first column, the numbers (2,1) are both independent measures of the effect when the factors A and B are both 1.
```          A=1   A=2   A=3
B=1    2     10    50
1     12    47
B=2    4      8    52
5      9    45
B=3    7      6    40
10      8    44
```
• Note also that the vassar online tools will do 2-way anova, with a few variations depending on pairing between samples, so that's an alternative to Excel. It'll even given the "which column or row is different", though it won't do plots.
• Do
• pg 609 and 610, #11 and #15.
• for both of these, find not only the p-value for main effect and interactions, but also sketch any plots appropriate to understanding what's going on.

## Eight

### due Tuesday April 5

• F-test : pg 444-450
• one-way ANOVA : pg 584-593 (k groups)
• Do
• pg 450, #11
• pg 616, #5
• pg 617, data analysis, #1 or #2

## Seven

### due Tuesday March 10

• Do
• Study for Test 2 through chap 9, time TBA
• Submit a project proposal : ask a question, acquire some data, and analyze it. It'll be due near the end of the term.

## Six

### due Thursday March 3

• Note: no class Tues March 1
• chapter 9 in Elementary Statistics, the parts on comparing means and proportions for small/large and paired/unpaired samples.
• Do
• pg 486-487, Exercises 11, 13
• pg 487, Data Analysis #3

## Six

### due Thursday March 3

• Note: no class Tues March 1
• chapter 9 in Elementary Statistics, the parts on comparing means and proportions for small/large and paired/unpaired samples.
• Do
• pg 486-487, Exercises 11, 13
• pg 487, Data Analysis #3

## Five

### due Thursday Febuary 24

• chapter 8 in Elementary Statistics, on hypothesis tests
• Do
• pg 388, #9 and #17
• pg 405, #11

## Four

### due Thursday Febuary 17

• chapter 7 in Elementary Statistics, on confidence intervals and the student's t-distribution
• Do
• pg 336, # 17, 19
• pg 350, #15
• pg 361, #2, 11
• pg 344, #7, 9
• because of the test, I'll
• Test Sat/Sun 19/20 on chapter 1-7
• Pick it up from my office door, do it, put it under the door.
• Closed book, don't talk to others.
• One sheet of notes, calculator or computer for calculations

## Three

### due Thursday Febuary 10

• chapters 5 and 6 in Elementary Statistics, on the binomial and normal probability distributions
• Do
• pg 248, numbers 7, 13, and 25.
• Chap 5 review exercises, pg 263 and following, numbers 11 (and sketch a plot of p(x)) and 19.
• pg 319, numbers 5 and 13.
• One more coming ... a dice experiment that I'll describe on Tuesday.

## Two

### due Thursday Febuary 3

• chapters 3 and 4 in Elementary Statistics
• Do
• Find the mean and standard deviation for the data in exercises 1 and 5 pg 159, chapter 3. Which formulas are you using? Why?
• Also do problems 13 and 17 on page 160.
• Check out the data files at CMU's Data and Story Library. For a data set of your choice,
• Construct a histogram.
• Find the mean and standard deviation.
• Find how much of the data is within 1 standard deviation of the mean
• and how much is within 2 standard deviations of the mean.
• OK, finally a few probability questions.
• Explain what we mean by the following, and why : the probability of A or B is P(A) + P(B). What assumptions are being made? What does this notation mean?
• Explain what we mean by the following, and why : the probability of A and B is P(A)* P(B). Again, what assumptions are being made?
• Do these exercises from chapter 4, pg 219 and following: 9, 25, 39