1. Lecture 5

2. Paper 1
Select an area of human endeavor (e.g., a particular sport, marketing, politics, car manufacturing …) and write a 5 page paper on how statistics influenced it.
Due on Thursday 9/29.
Make sure you clearly reference your sources (including websites)

3. Student’s presentations!
Yay

4. R
Loops
(functions, objects)

5. Issues Case sensitive dog and Dog are different
Careful of extra spaces
Brackets
( )
arguments of functions sum(coin); for(i in 1:10), if(coin<1)
grouping math formulas (1+3)*(4+5) vs 1+3*4 +5
[ ] indexing valus in a list coin[10]
{ } grouping commands togather

6. Fibonacci Fibonacci numbers
0, 1, 1, 2, 3, 5, 8, 13, … (explain)
Write a loop that prints first 100 fibonacci numbers
Idea: (wrap for loop around) New_Number <- Old_Number1 + Old_Number2 Old_Number2 <- Old_Number1 Old_Number1 <- New_Number

7. Homework
Create a code that writes first 100 numbers of “super Fibonacci” sequence
Xn = Xn-1+Xn-2+Xn-3, X1=X2=X3=1

8. Runs Q: Take guesses (closest will get a cookie)
Toss a coin times.
Run is an unbroken sequence of H in a row
What is the length of the longest run
Take guesses (closest will get a cookie)
We will write an R code together

9. Homework
Repeat 1000 times and calculate the average run (out of the 1000)

10. Writing code Think of the logic (algorithm)
Then write in the programming language