HW # 4
Chapter 7
18.
Playing the same lottery 1000 times doesnt guarantee he will win because each lottery is an
independent event. The outcome of the lottery has no influence over the next lottery.
24.
a) The outcome of the two coins are independent beca
Stats 7 spring 2015 (Baldi) Final 1
Problem 1 (16 points) < 30 min
Researchers examined the physiology of elderly
individuals. A random sample of 14 elderly individuals
was selected: 7 men and 7 women. Each subject came
to the lab twice: once to receive a
Stats 7 spring 2015 (Baldi) Final 2 SOLUTIONS
Problem 1 (14 points) < 15 min
A recent Pew Research publication on technology use asked a random sample of adult
smartphone users if they ever use their smartphone to avoid others around them. The findings ar
Stats 7 Fall 2016 - Homework 9
16.1 a. Appropriate. The response variable is quantitative and this is a comparison of independent groups.
b. Not appropriate. It's not a comparison of independent groups. There was only one group and all individuals
listene
Stats 7 fall 2014 (Baldi) Final
Problem 1
A recent study examines using copper bed rails in hospital intensive care units (ICU) as a way to
prevent hospital-acquired bacterial infections (HAI). Patients admitted to the ICU were randomly
assigned to a bedr
Stats 7 Fall 2016 - Homework 8
13.4 a. One population mean.
b. The difference between the means of two populations.
13.8 a. H0: = 25 where is the mean speed of all cars that drive through the area.
b. H0: 1 2 = 0 (or : 1 = 2) where 1 2 is the difference i
Stats 7 spring 2015 (Baldi) Final 2
Problem 1 (14 points) < 15 min
A recent Pew Research publication on technology use asked a random sample of adult
smartphone users if they ever use their smartphone to avoid others around them. The findings are
summariz
STATS 7: Basic Statistics, Dr. Baldi, fall 2016
Syllabus
Home
Class organization - Grading - Add/drop - Requirements
Lectures
Homework
Class objectives
Discussions
My objective is to provide both an understanding of and hands-on experience with basic, dat
Stats 7 spring 2015 (Baldi) Final 1 SOLUTIONS
Problem 1 (16 points) < 30 min
Researchers examined the physiology of elderly
individuals. A random sample of 14 elderly individuals
was selected: 7 men and 7 women. Each subject came
to the lab twice: once to
Stats 7 Fall 2016 - Homework 7
11.3 a. Procedure for two independent samples.
b. Procedure for paired data.
c. Procedure for two independent samples.
11.29 a. s.e. ( ) = s/n = 6/9 = 2. Roughly, this is an approximation of the average difference between th
Stats 7 Fall 2016 - Homework 6
10.4 a. U.S. adults
b. Proportion of U.S. adults who think that cell phone use while driving should be illegal
c. The 1025 individuals surveyed
d. .54
10.11 This sample should not be used to calculate a confidence interval b
Practice Multiple Choice Questions from Chapters 9-13
1. Which of the following is an example of paired data?
a. A random sample of students is asked how much money they made during the past
summer. Results for males and females are compared.
b. A randomi
Practice Multiple Choice Questions from Chapters 9-13
1. Which of the following is an example of paired data?
a. A random sample of students is asked how much money they made during the past
summer. Results for males and females are compared.
b. A randomi
Statistics 8, Fall 2010
Sample Final Exam Free Response Questions
If this were the real exam, appropriate tables would be provided, but are not attached to this sample exam. Also,
you would be given more space for some of the answers. This was condensed s
Announcements
Homework #7 due today by 5pm.
Discussions this afternoon and Friday are
reviewing for the final exam.
Final exams next week:
Lecture B: Monday, Mar. 16, 1:30-3:30pm
in HSLH 100A
Lecture C: Wednesday, Mar. 18,
1:30-3:30pm in SSLH 100
Frid
Announcements
The Plan
Last discussion activity this week!
You must attend discussion AND complete the EEE Survey
reflection questions within 24 hours for full credit.
Midterm 2 exams will be returned during discussion this
week as well.
Homework #6 d
Announcements
The Plan
Homework #7 due Wed. by 5pm.
This homework wont be returned to you prior to the
final exam, so make a copy or take a picture if it before
turning it in.
Solutions will be available in EEE Dropbox Thurs.
Final exam information an
Stats 7 fall 2014 (Baldi) Final SOLUTIONS
Problem 1 A recent study examines using copper bed rails in hospital intensive care units (ICU)
as a way to prevent hospital-acquired bacterial infections (HAI). Patients admitted to the ICU were
randomly assigned
Stats 7 Fall 2016 - Homework 10
15.1 a. Appropriate. Both variables are categorical.
b. Not appropriate. Both variables are quantitative.
15.2 a. Not appropriate. Amount willing to spend is quantitative.
b. Appropriate. Both variables are categorical.
15.
Assignment #2 (Ch. 3)
7.
a) The response variable is stopping distance and the explanatory variable is
speed.
b)
The relationship is positive, with higher speeds corresponding with larger
stopping distances. It somewhat appears to be curvilinear.
8.
a) Th
HW 3 (Ch.5 and Ch.6) and 2 paragraphs
Chapter 5
14.
a) Response Bias
b) Selection Bias
c) Nonparticipation Bias
72.
The presidential question goes first so that the other subsequent questions do not influence
the respondent. The order is good because the
Assignment 1 (Ch 2)
1.
a) 4 variables (poverty rate, per capita income, serious crime rate, teen birth rate)
b) a U.S state
c) 50
2.
a) 2 variables
b) US adults
c) 620
19.
a) 1 variable (whether or not the person supports the law about
smoking),
This is c
Stats 7 Homework 3: Due Thursday, Jan. 28 by 5:00pm
You may either hand-write or type your homework assignments. If you hand-write your homework, it must be well-organized, clean, and legible; if we cannot read your handwriting, you may lose
points. Each
Stats 7 Homework 4: Due Wed., Feb. 10 by 5:00pm
You may either hand-write or type your homework assignments. If you hand-write your homework, it must be well-organized, clean, and legible; if we cannot read your handwriting, you may lose
points. Each prob
Stats 7 Homework 1: Due Wednesday, Jan. 13 by 5:00pm
You may either hand-write or type your homework assignments. If you hand-write your homework, it must be well-organized, clean, and legible; if we cannot read your handwriting, you may lose
points. Each
Stats 7 Homework 2: Due Wednesday, Jan. 20 by 5:00pm
You may either hand-write or type your homework assignments. If you hand-write your homework, it must be well-organized, clean, and legible; if we cannot read your handwriting, you may lose
points. Each
Available Review Resources
Announcements
Homework solutions for Homeworks 1 and 2 are posted
in the EEE Dropbox.
Quiz solutions if taken (for the particular questions you
were given) are available in the EEE Quiz tool.
The course webpage has:
Quiz #3
Announcements
Important Midterm Exam 1 Info
Homework #2 due tomorrow (Thurs) by 5:00pm.
You must bring the following with you to the
midterm:
Solutions will be available in EEE Dropbox Thursday
evening.
Graded Homework #1 will be passed back during Fr
Announcements
The Plan
Homework #2 due Thursday by 5:00pm.
Midterm Exam 1 is one week from today (Mon. Oct.
19)!
Finish Lecture 7 slides on Simpsons Paradox.
Chapter 4 Section 4.4 on chi-squared tests of
independence for two categorical variables (the
The Plan
Announcements
Discussions today are an introduction/demonstration
of R Commander. Bring your laptop so you can
follow along!
Online Quiz #2 opens in EEE at 1pm today closes
at 10am on Monday.
Homework #2 due Thursday by 5:00pm.
Today is the l
Announcements
The Plan
Last discussion activity this week!
Finish slides from Lecture 20 on sampling
distributions for our five scenarios.
Chapter 12 Sections 12.1-12.3 on hypothesis
testing involving population proportions.
You must attend discussion
Announcements
The Plan
Homework #7 due Wed. by 5pm.
This homework wont be returned to you prior to the
final exam, so make a copy or take a picture if it before
turning it in.
Solutions will be available in EEE Dropbox Thurs.
Final exam information an
Announcements
The Plan
Homework #6 due today by 5pm.
Will post Homework #7 (due next Wednesday)
on course calendar.
Midterm 2 exams are graded see email for
more information.
Finish Lecture 21 slides on hypothesis tests for
population proportions.
Re
The Plan
Announcements
Finish slides from Lecture 22 on hypothesis
testing for one population mean.
Hypothesis tests for:
This weeks quiz opens at 2pm today closes
Monday at 11am.
Homework #7 due Wednesday by 5pm.
Paired difference in means (Section
Announcements
The Plan
Homework #6 due today by 5pm.
Will post Homework #7 (due next Wednesday)
on course calendar.
Midterm 2 exams are graded see email for
more information.
Finish Lecture 21 slides on hypothesis tests for
population proportions.
Re