10.2 BEST Fit Lines
We have all drawn best fit lines, and we have also used LinReg ax+b on the
calculator. This is how the calculator actually finds the BEST fit line.
* y=a + bx *
a is
5.4 Geometric Distribution
Suppose we have an experiment where we will repeat binomial trials until we get
the FIRST success. We use n to denote the first trial that is successful.
Say we were trying to
3.1 Measures of Central Tendency: Mean, Median, and Mode
Mode: the value that occurs the most frequently
Find the mode
5
3
7
2
4
4
2
4
8
3
4
3
A data set can have two modes. If there ar
12.1 The Fundamental Counting Principle and Permutations
FACTORIALS:
Definition: A factorial of n objects is denoted n! and represents :
n! = n (n 1) (n 2). 2 1
4! =
Question:
7! =
15!=
How many different ways can we seat 4 people in only 3 chairs?
Method
2.3 Ogives and Stem and Leaf Displays
Ogive -is a graph that displays cumulative frequencies. It is useful for determining
the number of data values above or below a specified value
Using the data from when we
3.2 Measures of Variation
Range:
Standard Deviation: a measure that lets us know by how much a group of data
differs
Sample standard deviation s =
(x x )2
n 1
Sample Variance: same as sample standar
5.3 More Binomial Distribution
Graphs of Binomial Distributions
A waiter at a restaurant has learned over time that the probability that a lone diner
leaves a tip is .7. During one lunch hour he serves six lo
12.2 COMBINATIONS
Question 1: How many arrangements of 4 people in 3 chairs can we make, where order doesnt
matter?
Method 1: List all Possiblilities
ALL THE PERMUTATIONS ARE:
A
A
A
A
A
A
B
B
C
C
D
D
C
D
B
D
C
B
C
C
C
C
C
C
A
A
B
B
D
D
B
D
A
D
A
B
B
B
B
B
4.2 Probability of Compound Events
We want to find the probability of two events occurring TOGETHER. For this we
will use compound probability rules
Independent Events: the occurrence or nonoccurrence of one
2.1 Bar Graphs, Circle Graphs, and Time Plots
Features of a Bar Graph
1. Bars can be _ or _
2. Bars are of uniform _ and evenly _
3. The Lengths of the barts represent values of the variable being displayed, t