Running head: UNIT 4 ASSIGNMENT 1 ANSWER TEMPLATE 1
Unit 4 Assignment 1 Answer Template
Student Name
Capella University
UNIT 4 ASSIGNMENT 1 ANSWER TEMPLATE 2
Unit 4 Assignment 1 Answer Template
The fo
Independence
Two events A and B are independent if P(B|A) = P(B).
Example:
A = cfw_roll 5 on first roll of a fair six-sided die
B = cfw_roll 3 on second roll of a fair six-sided die
Since the outcome
MA251 Probability &
Statistics
Chapter 1: Picturing Distributions with
Graphs
organize, picture,
summarize real
data
Statistic
Overvie
s
Descriptive
Graphic
bar graphs
pie charts
time plots
histograms
MA251 Probability & Statistics
Chapter 11: Introducing Probability
Probability is not intuitive
Consider these questions.
1. When tossing a fair coin, which string of heads
(H) and tails (T) is more l
MA251 Probability & Statistics
Chapter 17: Test of Significance: The Basics
Topics
What is a test of significance?
Steps in testing a claim
P-value & Test Statistic
Practice Problems
One-tailed v
Chapter 12
General Rules of Probability
We will build upon the previous discussion of
probability.
1
Review of Probability Rules
1. 0 P(A) 1
2. If S is the sample space for a probability model, then P
MA251 Probability & Statistics
Test 1 Review
Take a look at . . .
6.18, 6.20, 6.22, 6.23, 6.24, 6.27, 6.28
LaunchPad
On the exam you should be able to . . .
1. Match a scatterplot to an r value.
2. Id
Conditional Probability
Let A = cfw_first card is an ace and B = cfw_second card is an ace. What is the
probability of drawing an ace from a deck of cards? P(A) 4 1 0.0769
52
13
Given that one ace has
Summary
The least-squares regression line is the straight
y aline
bx
that
minimizes the sum of the squares of the vertical
distances of the observed y-values from the line.
You can use a regression
Extensions
What other sorts of statistical tests are out
there?
1
What Else is in the Calculator?
Weve used almost all of the statistical tests
that the TI 83/84 provides.
2
Testing a Single Variance
Chapter 5
Section 5.1
Check Your Understanding, page 286:
1. (a) This probably means that if you asked a large sample of U.S. adults whether they usually eat
breakfast, about 61% of them will answer y
DEPARTMENT OF QUANTITATIVE METHODS & INFORMATION
SYSTEMS
Introduction to Business Statistics
QM 120
Chapter 5
Discrete random variables and their probability
distribution
Spring 2008
Dr. Mohammad Zain
Chapter 9: An Introduction to Probability and Statistics
This material is covered in the book: Erwin Kreyszig, Advanced Engineering Mathematics (9th
edition) Chapter 24 (not including sections 4 and 9
MA251 Probability & Statistics
Chapter 1: Picturing Distributions with Graphs
Statistics
organize, picture,
summarize real
data
Overview
Descriptive
Numeric
Graphic
bar graphs
pie charts
time plots
hi
Warm-Up
1. These histograms show the distributions of
the ages of actresses and actors when the
won an Oscar for Best Actress/Actor.
a.
b.
How would you describe each distribution?
What conclusion(s)
Teams by County
Facebook
Teams by County
Facebook
Practice
The following is a list of estimated Presidential IQs.
80 103 104 105 118 119 120 120 121
121 122 123 126 126 128 128
130 130 131 132 132 132
MA251 Probability & Statistics
Chapter 4: Scatterplots & Correlation
Dr. Soltys
Essential Questions
(Scatterplots) and how is one created?
What is a scatterplot
What is the difference between an
expla
MA251 Probability & Statistics
Chapter 6: Two-Way Tables
Dr. Soltys
Chapter 6
Two-Way Tables
In chapters 4 and 5, we investigated
relationships between two quantitative
variables. In this chapter we a
Warm-Up
Suppose that a study is conducted to explore the connection
between calculator use and success on the 11th grade PA state
math test (PSSA). The researcher collects the following
information fr
Warm-Up
9.33 Getting teachers to come to school.
Elementary schools in rural India are usually small, with a
single teacher. The teachers often fail to show up for work. Here is
an idea for improving
Warm-Up
10.49 Random numbers.
Many random number generators allow users to specify the range
of the random numbers to be produced. Suppose that you specify
that the random number Y can take any value
Example
Suppose that Etown claims the average SAT score for
incoming Freshman (i.e. class of 2015) is 1126.5 with a
standard deviation of 141.5. In order to test this claim,
we will take a random samp
MA251 Probability & Statistics
Chapter 8: Producing Data: Sampling
Topics
Population vs. Sample
Sample Design
Non-random Samples
Random Samples
Cautions about sample surveys
Inference about the popula
11.37 Playing the numbers.
Warm-Up
The numbers racket is a well-entrenched illegal gambling
operation in most large cities. One version works as follows: you
choose one of the 1000 three-digit numbers
Review
Suppose that cards are to be selected from a standard
deck of 52 without replacement. Calculate each of the
following.
13
a. P(a diamond and a spade) 13
= 13
=.0 6 4
52
b.
51
4
P(an Ace or a 2)
Chapter 22
Two Categorical Variables: The Chi-Square
Test
In this chapter, we determine how to
assess a relationship between two
categorical variables.
1
Essential Ideas
q
q
Chi-square distributions
E