MTH 125
Lab 1 Sampling Methods
Name _
Stratified Random Sampling
You will use our class data. (Since this is an online course, your class data can be the
data you collect from friends, family, coworkers, etc. Anyone you come into contact with
you can use
1. If we take many simple random samples from the same population, we expect the
same values of the statistic for each sample.
A. True
B. False
2. Taking a larger sample will help reduce the bias caused by a
Name: TA: Recitation Time:
Lab Activity #2: Experilnents
Today, you will conduct an experiment as a class and then critique this experiment. You will also attempt to answer some
questions about your understanding of different terms and concepts. You
Stat 135 Spring 2013 Practice Midterm Exam #2 Solutions
Instructions: On questions 11-14, you MUST show your work and explain to receive full
credit. There is no need to show your work on questions # 1-10.
True/False (circle one) and Multiple Choice (circ
Stat 1350
Exam 2 Review
Spring 2013
1. At a particular gas station, there are three grades of gas (no diesel). The proportions of people
who buy regular unleaded, extra unleaded and premium unleaded are 0.6, 0.3, and 0.1,
respectively.
a) What is the chan
Stat 135 Spring 2012
Midterm Exam #1 (200 points)
Name_
Practice Version Solutions
TA _
Instructions: On questions 13-17, you MUST show your work and explain to receive full credit.
There is no need to show your work on questions # 1-10.
True/False (circl
Practice Problems for Midterm Exam #2
STAT 1350, Spring 2015
These problems are meant to give you extra practice as you prepare for Midterm Exam #2. We
also want you to get a good sense of what the structure of the actual midterm exam will be like
(note t
Practice Questions for Midterm Exam #1 (KEY)
STAT 1350, Spring 2015
True/False (circle the best answer)
1. The reliability of a measurment process can be seen by looking at the variability of a group of
independently repeated measurements. TRUE
2. The his
Stat 1350
T
Practice Final Exam
* True or False (no need to explain)
F 1) A test statistic is used to measure the difference between the observed sample data and
what is expected when the null hypothesis is true.
TF
T
2) If a value has a standard score of
Stat 135
Practice Final Exam
Name
OUTLINE OF SOLUTIONS
* True or False (5 points each - no need to explain)
True 1) A test statistic is used to measure the difference between the observed sample data and
what is expected when the null hypothesis is true.
Suggested Answers Practice Problems for Midterm Exam #2
STAT 1350, Spring 2015
Be sure to talk with us if you have questions about any of the following answers!
True/False (circle the best answer)
T
F 1. If a distribution is symmetric, it has to be consid
Ashley Peter
Recitation Leader: Hui Yang
Recitation Time: Tuesdays 6:30 PM
For my Data In Everyday Life Project, I chose the variable number
of hours your sleep per night. I chose this variable because Ive noticed
that since entering college, I have not b
Extra Lecture 9 Slides
Comparing the mean and median:
For distributions skewed to the left:
mean < median
For distributions skewed to the right:
median < mean
For symmetric distributions:
mean =median
The mean follows the tail, the median does not
When Nu
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ADVERTISEMENT
https:/www.youtube.com/watc
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We found this Tide Pod
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commercial.
SPECIFIC CLAIM BEING M
Practice Questions for Midterm Exam #1
STAT 1350, Spring 2015
These problems are meant to give you extra practice as you prepare for Midterm Exam #1. Note
the actual midterm will not contain this many questions, and the questions on the actual midterm
wil
STAT 1350: Elementary Statistics
Spring, 2015
Statistical thinking will one day be as necessary for efficient citizenship as the ability to read and
write.
-H.G. Wells
Instructors
Office Hours and Locations
Email
Dr. Michelle Everson, Course
Coordinator
M
Namc: TA: Recitation Time:
Lab Activity #3: Reviewing Some oi the Big Ideas
STAT 1350, Spring 20l5
can».
It
Today. our focus is on reviewing some of the big ideas from Chapibrs 1-6 and Chapters 8. You will work
through the following questions with at le
Reviewing for Midterm Exam #1
Please work through the following problems with at least one other student. These problems are meant to
help you review and to give you some practice with the kinds of questions you might see on the first
midterm exam. If you
Reviewing for Midterm Exam #1
STAT 1350, Spring 2015
The following outline is meant to highlight the material we have covered during the first five weeks of
the semester. This is the material we will expect you to know and understand for Midterm Exam #1.
Reviewing for the Midterm
Where do data come from? (Chapter 1)
Individuals, variables, populations, samples, observations studies, surveys,
experiments, census
Samples, Good and Bad (Chapter 2)
Bias, convenience sampling, voluntary response sample, si
Final Exam Review
Announcements
Please fill out SEIs!
HW 8 due Tuesday, December 9th
Final Exam Monday, December 15th from 6:00-7:45 pm
Locations posted on Carmen as well as details
You are allowed 2 sheets of paper, each front and back
Practice final
Describing Relationships:
Scatterplots and Correlation
Announcements
HW 5 is due Wednesday, 10/29
Second midterm exam Monday, November 10th at 5:20 pm
If you cannot make this exam time, e-mail Dr. Everson ([email protected])
by Monday, November 3rd; d
Describing Distributions
with Numbers
Announcements
Data from Everyday Life Project finish collecting data on
September 30th
You will need to show your collected data to your recitation leader next
Wednesday (or you will lose 5 points)
HW 3 due Wednesd
More on Probability and
Sampling Distributions
https:/lh6.ggpht.com/9hRPEN9wjcIdCKokXTNe0iTDTm9DXq5Mjf0kXpTXMChraeRO4ctMjedsX0WhJ-tZdxvkG6s0hI0ZCIipqJY=s500
Announcements
HW #6 due Wednesday, November 5th
Please make a copy of this assignment so you can
The Basics of Confidence
Intervals
Announcements
HW 7 will be due Tuesday, November 25th (not next Wednesday)
If you have recitation on Tuesday, you will turn it in to your recitation TA
If you have lecture on Tuesday, you will turn it in to me in lect
Chance and Probability
Announcements
HW 5 due Wednesday, 10/29
Midterm 2 on Monday, November 10th at 5:20 pm
E-mail Dr. Everson ([email protected]) by November 3rd if you have a
conflict with the exam time, even if you had the same conflict for the la
Review for Midterm Exam
#2
Announcements
Second midterm exam on Monday, November 11th, from 5:20 to 6:15
pm
You will be in the same room you were in last time (100 Independence Hall or
131 Hitchcock Hall)
You are allowed one sheet of notes and a calcul
Final Exam Review
Announcements
Please fill out SEIs!
HW 8 due Tuesday, December 9th
Final Exam Monday, December 15th from 6:00-7:45 pm
Locations posted on Carmen as well as details
You are allowed 2 sheets of paper, each front and back
Practice final
Graphs: Good and Bad
Announcements
HW 2 due Wednesday, 9/24
Review Matched Pairs Design
Choose pairs of subjects that are as closely matched as possible
You might measure the same subject twice, or match each subject with himself/herself
You might mat
Homework Assignment #4
STAT 1350
1. True or False: If our observed value is below the mean, the Z score
will be a negative number.
2. True or False: Suppose we have data that are normally distributed
with a mean of 150 and a standard deviation of 6. Given
Homework #3
STAT 1350
1. True or False? In a histogram, if the mean is less than the median, the distribution is
considered to be skewed to the right.
2. True or False? You cannot tell the exact size of a sample from looking at a boxplot.
3. The range of
Homework 5 Correlation and
Regression
1. True or False: Correlation has no units
2. True or False: The value of a correlation coefficient must always be
between 0 and 1.
3. True or False: A regression equation to predict test score from
number of hours st
Homework #2
STAT 1350
1. An article in the Chicago Tribune reported that, according to two large studies, overweight
individuals are significantly less likely to die prematurely if they undergo stomach surgery to
lose weight. The article points out that p
Homework #1
STAT 1350
1. True or False: If we take many simple random samples from the same population, we expect the
same values of the statistic for each sample.
Answer: False
2. True or False: Taking a larger sample will help reduce the bias caused by