MULTIPLE CHOICE and TRUE/FALSE PROBLEMS (6 points each)
WE WILL ONLY GRADE WHATS ON THE ANSWER SHEET (LAST PAGE) FOR MC/TF.
1. The output below gives summary statistics for a dataset of 100 people. Th
Stat1430
Recitation8
Sections2.12.5,5.1
USEPROPERPROBABILITYNOTATIONTHROUGHOUT!
2.12.4Review
A. Suppose you find X has a strong correlation with Y and the scatterplot shows a strong linear
relationshi
STAT 1430
Recitation 12B (SOLUTIONS) Normal Approx/Sample Dist
Show all work. Use the table or normal approx. whenever they are appropriate. When using normal
approx., remember to check all conditions
Stat1430
ExtraPracticeSolutions
Sections2.12.4
1. Writedownadatasetthatcontainsfive(x,y)pointswhosecorrelationisEXATLYone.Drawa
scatterplotofyourdatasetbelow.(answersmayvaryhere)
Data
Pont
Xvalue
Yva
Data Collection: Samples and
Surveys
Methods of Collecting Data
Observational Studies (part 1)
Most common observational study: Surveys
Experiments (part 2)
The difference between the two:
Main Object
Data Collection: Experiments
Designing Experiments
What is an experiment?
What makes a good experiment?
Different designs of experiments
Observational studies
An observational study
Observes individua
Data Displays: Examining Data
Distributions
Big Picture: Organize and summarize your data
set as a first step in data exploration
Organize a data set using graphs
Summarize a data set using numbers
Ak
Conditional Probability
Tools so far
Find P(A) - marginal
Given, Use math, Complement Rule
Find P(A and B) - joint, intersection
Multiplication rule (general and special cases)
Find P(A or B) - union
Descriptive Statistics and Boxplots
Measure, interpret, compare, measures of
center and variability in data sets.
Center: Mean and Median
Variability: Standard Deviation, Quartiles
Boxplot: Another Gr
Examining Relationships in
Quantitative Variables:
Correlation and Regression
Coffee sales at football games
You are the consessions manager for the
Buffalo Bills
You need to make enough coffee to sup
Normal Distribution
The Normal Distribution
Type of variable: continuous
Shape bell shaped, symmetric
Center u*x=M
Spread variability, SDx
Picture
68-95-99.7 Rule: rough idea of normal
probabiliti
Data Collection: Samples and
Surveys
Methods of Collecting Data
Observational Studies (part 1)
Most common observational study: Surveys
Experiments (part 2)
The difference between the two:
Main Ob
Data Collection: Experiments
Designing Experiments
What is an experiment?
What makes a good experiment?
Different designs of experiments
Observational studies
An observational study
Observes indi
Public Affairs 6070: Assignment 5
1.
Television Ads: You own a chain of stores that sells television sets and you
want to know whether your advertising is increasing your sales. Let Y be the
number of
Simpson's Paradox
Question and Answer
This assignment is in two parts.
1. In 1987, the Department of Transportation began monitoring the percentage of flights,
for each airline, that arrived on time a
STAT 1430 Midterm 1 Exam Information SP 2014
Midterm 1 is Thursday, February 13, from 7:00 to 8:15 p.m. Rooms to be announced. The
information is posted on Carmen and will be emailed to you.
Midterm
Probability Rules
Agenda
Basic terms and concepts
How to calculate probabilities
Multiplication Rule
Addition rule
Complement Rule
Special cases
Basic terms of Probability
Sample space
Loading
Events
Random Variables
Part 2a: Continuous Random Variables
Agenda
Continuous random variables
Probability density functions
Properties
Finding probabilities
Finding the mean and standard deviation of a
con
Two-way tables
Relations in Categorical Data
Exploring relationships between
categorical variables
Should we market BMWs more to men or
women? Or is it about the same?
Which age group purchases more i
Data Collection: Samples and Surveys
Methods of Collecting Data
Observational Studies (part 1)
Most common observational study: Surveys
Experiments (part 2)
The difference between the two:
Observa
STAT 1430 Formula Sheet
This same formula sheet will be attached to all exams. No other review/cheat sheets or other
materials may be used on the exams.
1
=
( )2
1
=
1
(
)(
)
1
= 0 + 1
1 = ( )
0 =
Data Collection: Samples and
Surveys
Methods of Collecting Data
Observational Studies (part 1)
Most common observational study: Surveys
Experiments (part 2)
The difference between the two:
Observa
Data Collection: Experiments
Designing Experiments
What is an experiment?
What makes a good experiment?
Different designs of experiments
Observational studies
An observational study
Observes indi
STAT 1430 Case Study #1 Spring 2016 RUBRIC/SOLUTIONS
The questions have been included with these solutions to make them easier to understand. However, the
questions should NOT have been included in st
STAT 1430
Recitation 3A
SOLUTIONS
Data Set: Billionaires in the world as published by fortune magazine in 1992
Variables:
Wealth: Wealth of family or individual in billions of dollars
Age: Age in ye
STAT 1430
Recitation 3B
SD and Boxplots
STANDARD DEVIATION
1. Suppose the mean of a data set is 10, the median is 20, and the standard
deviation is 5. What happens if you multiply all the values in th
STAT 1430 Recitation 6ASimpsons Paradox and Probability Rules
Mike and Tom are on a baseball team. They keep track of their batting statistics for two
seasons. They count the number of times they got
Lecture 5 Worksheet
.
Inventory
Orders
Warranty Types
You
own a small Computer Retailing company that sells computer
systems. You have created a spreadsheet that stores basic sales information.
Invent