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
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 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 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
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
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
Basics of the Normal
Distribution
http:/www.mfolz.com/science-details/larges11.htm
Announcements
HW 3 due Wednesday, October 8th
First midterm exam Monday, October 20th at 5:20 pm
Remember to e-mail Dr. Everson (everson.50@osu.edu) if you have a confli
Probability Models
Announcements
HW 6 due Wednesday, November 5th
Midterm 2 on Monday, November 10th at 5:20 pm
E-mail Dr. Everson (everson.50@osu.edu) by November 3rd if you have a
conflict with the exam time, even if you had the same conflict for the
More on Graphs of
Distributions
Announcements
HW 2 due right now!
Recall
We have two different types of variables: quantitative and qualitative
Like to graph the distributions of these variables
Last time, we talked about two types of graphs for quali
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 (everson.50@osu.edu)
by Monday, November 3rd; d
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
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
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ADVERTISEMENT
https:/www.youtube.com/watc
h?v=
QsOEs74CmJ0
We found this Tide Pod
Advertisement on a television
commercial.
SPECIFIC CLAIM BEING M
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
More on Confidence
Intervals
Announcements
HW 7 due Tuesday, November 25th
Final Exam is Monday, December 15th, at 6 p.m
If you have a conflict with that time, you must let Dr. Everson (
everson.50@osu.edu) know by Monday, December 1st, at 5 p.m.
Confi
Tests of Significance
(Hypothesis Tests)
Source: http:/tinyurl.com/lmhkkrr
Announcements
HW 7 due Tuesday, November 25th
Final Exam is Monday, December 15th, at 6 p.m
If you have a conflict with that time, you must let Dr. Everson (
everson.50@osu.edu)
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
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
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
Chance and Probability
Announcements
HW 5 due Wednesday, 10/29
Midterm 2 on Monday, November 10th at 5:20 pm
E-mail Dr. Everson (everson.50@osu.edu) by November 3rd if you have a
conflict with the exam time, even if you had the same conflict for the la
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
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
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 Graphs of
Distributions
Announcements
HW 2 due Wednesday, 9/24
Recall
We have two different types of variables: quantitative and qualitative
Like to graph the distributions of these variables
Last time, we talked about two types of graphs for
More Practice with Forward
and Backward Normal
Problems
Announcements
HW #4 due Wednesday, October 15th
First midterm exam Monday, October 20th at 5:20 pm
Remember to e-mail Dr. Everson (everson.50@osu.edu) if you have a conflict
and need to take the m
More on the Normal
Distribution:
Forward/Backward
Problems
Source: http:/www.mathfunny.com/normal-paranormal-distribution-ghost-math-joke-funny-cartoon/
Announcements
HW 3 due Wednesday, October 8th
Data from Everyday Life Project due Wednesday, October
Describing Relationships:
Regression and Prediction
http:/upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Linear_regression.svg/400px-Linear_regression.svg.png
Announcements
HW 5 due Wednesday, October 29th
Midterm 2 on Monday, November 10th at 5:20 p
More on Hypothesis Testing
http:/i54.photobucket.com/albums/g96/cosxoverx/wc/kls20061128.jpg
Announcements
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
Mean, Median, Mode, and Range (A)
Calculate the mean, median, mode, and range of each set of numbers.
1)cfw_12,15,15,33,36,39,50,53,54,54,58,64,67,73,73,74,81,82,82,90
2)cfw_11,13,13,13,14,16,17,18,19,19,20,21,28,28,40,73,76,83,96,99
3)cfw_13,14,14,19,1
Stem-and-Leaf Plots [A]
Answer the questions about the stem-and-leaf plot.
1. Determine the minimum value, maximum value and range of the data.
2. Determine the count, median, mode and mean of the data. Round the
mean to one decimal place if necessary.
Reading Pictographs (AJ
Answer the questions about the pictograph.
Number of School Buses at Schools in Great Line School District
B.PascalP.S. E E E E a a a
EuclidP.S. a a a a a
. Central 13.5. a a
NorthCentralP.S. a E a a E a
M.C.EscherP.S. a a a
a = 2