Pre-Calculus Semester 1
Formulas
Polynomials
Given the polynomial equation
ax 2 bx c 0
b b 2 4ac
x
2a
discriminant is
b 2 4ac
Given the polynomial function
Average Rate of Change
Given a function
y f x
y ax bx c
2
the axis of symmetry is given by the equa
Intended Christmas Gift Spending Over Time
For our topic we chose to research the amount of money that U.S. consumers intended
to spend each year on Christmas gifts and how it changes every year. We believed that the data
would have a negative correlation
Background:
M&Ms are a delicious candy-coated chocolate snack that many people all over the world
enjoy. There are many different kinds of these snacks currently on the market.
Including, but not limited to peanut, peanut butter, and pretzel. All of these
Chapter 7
7.1 Distributions of Samples
Parameter
o Numerical characteristic about the population. Typically the value is unknown
1. , p, squiggly squared, regular square
o Statistic1.
Characteristic about a sample. Typically used to predict the
populatio
Chapter 5
Probability Language 5.1
Empirical Probability: Probability obtained through observation
Law of Large Numbers (of trials): Chance behavior is unpredictable in the short run but a predictable
pattern in the long run.
Random DOES NOT EQUAL Haphaza
Chapter 2
Chapter 2.1 A Closer Look at Percentiles
Pt. 1
Pn = Value of Data where at least n% of the date fall below this value
P8 = 22nd score
.08 x 267 - 21.36
Discrete Data
% x n = Location of the Percentile (Always round up)
Continuous Data
Example:
C
Chapter 1: Exploring Data
Introduction: Data Analysis: Making Sense of Data and 1.1 Categorical vs.
Quantitative Data
Vocabulary
Individuals: objects described by a set of data. Ex: people, animals, or things
Variable: any characteristic of an individual.