Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
7/28/2016
Homework IV. A
Suppose we are interested in the proportion of adults in the U.S. with a bachelors degree or
higher. We randomly select 5000 adults in order to estimate this proportion. Use this i

Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
6/27/16
Homework I.A.
1
All residence of Lexington is known as what?
-the population
2
The proportion of residence in Lexington with a gun is known as what?
-the statistic
3
The 1500 residents who were ide

Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
6/27/16
Homework I.B.
1
Suppose we collect data from all soldiers stationed at Fort Bragg, NC. What is the issue with
this sample? This sample is bias because it only involves soldiers station at Fort Brag

Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
6/28/16
Homework I.C.
Suppose we are interested in how application cost affects the number of students who apply to a
college. We have access to a sample of this information through a national database.
1)

Econ 102A
Introduction to Statistical Methods for Social Scientists
Stanford University
Course Materials for Week 3
Professor Scott M. McKeon
Autumn Quarter, 2016 - 17
Scott M. McKeon
All Rights Reserved
Week 3
Goals:
1.
Understanding random variables.
2

Designed by Jamie DeCoster & Anne-Marie Iselin on 04.06.2006
This and other Excel spreadsheets are available at http:/www.stat-help.com
Enter the appropriate values in the light blue boxes. Excel will compute the values in the yellow boxes.
Z
0.1
Obtainin

Jay Fuster
11/14/16
English 90
Son of Moses
7:15 AM Southern California
Thats it, Maximus thought to himself as he dragged on a cigarette while
ripping his matte black Harley Davidson through the morning LA smog. If I dont get
rid of those Chuto fuckers t

Econ 102A
Statistical Methods for Social Scientists
Page 1 of 3
Medical Testing Example from First-Lecture Quiz
Suppose you are a physician testing an individual for a certain disease. Before examining
the patient, you believe there is a 1% chance the per

Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
7/13/16
Homework II.D
1
The above graph illustrates perfect positive linear correlation. What is the correlation
coefficient, r for this data? r = 1
2
The above graph illustrates perfect negative linear co

Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
7/9/16
Homework II.A
1
How many variables are included in the graph? there is only one variable included in the pie
chart.
2
Based on the graph, what energy source makes up the highest percentage of the Un

Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
7/29/2016
Homework IV. B
1
What is the z used to create a 95% confidence interval? -1.96%
2
What is the level of significance for a 95% confidence interval? one minus the level of
confidence (0.96%).
A ran

Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
7/19/2016
Homework III. A
1
How many possible outcomes are there? -18 possible outcomes
2
Give the sample space. (1 h/h, 1 h/t, 1 t/t) (2 h/h, 2 h/t, 2 t/t) (3 h/h, 3 h/t, 3 t/t) (4 h/h, 4 h/t,
4 t/t) (5 h

Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
7/11/16
Homework II.C
1
Above is a contingency table created from a sample identifying gender and religious
importance. Use the table to create another contingency table based on column totals.
Male
Female

Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
7/20/2016
Homework III. B
1
What is wrong with the following probability distribution? there is a negative number
Color, X
P(X)
2
Probability Distribution for Colors of Peanut M&Ms
Brown
Red
Yellow
Green
O

Leah Haeuber
STA 210 19Z4
Professor Barbara Elzey
7/21/16
Homework III. C
For the questions in this homework, you will need to use the standard normal distribution table.
1
Find
2
Find
3
Find
4
Find
P Z 2.3
-.01072
P Z 0 .3
-.38209
P 0.6 Z 1.7
P Z 4.9