STAT 3005 On Line
Test 1
June 9, 2016
Take Home Test # 1 Directions
Please read carefully the following directions
1. You will submit your answers for this test on Scholar. You will have only one opportunity to
submit the test.
2. Complete this exam in yo
Stat 3005 OnLine
Homework 2
Homework Directions
Please read carefully the following directions
1. Open HW 2 homework in Assignments to answers all the questions.
2. You will have three opportunities to submit the homework. The latest grade will be consid
First Year Expense Planning
Jiayu Chen
05/04/2017
Since I am in math major, I will be a high school math teacher after graduation from
VT. I am a math teacher in one of high schools in Virginia. And the web site
(https:/www.glassdoor.com/Salaries/blacksbu
Mutual Fund Analysis Profile
(Use this Word file to enter the answer after each question. Save, print and submit.)
1. What is the name and ticker symbol for the fund? Is the fund open to new investors?
2. What is the funds objective?
3. What is the funds
STAT3005 on line
Homework # 1
Summer I
You must show all of your work for each problem in order to receive full credit.
HW Due 05/25/2017, by 8:30 pm.
CH 1: 1.8, 1.39, 1.40.
1.23, 1.24, 1.25 *(to answer this questions use the data given and your calcula
3.7
1.
5
6
7
8
9
58
058
00235558
000035557
00022338
The distribution is skewed left and unimodal with a minimum of 55 and a
maximum of 98.
Percent
60
50
40
30
20
10
2.
0
StronglyAgree
a.
MildlyAgree
MildlyDisagree
StronglyDisagree
Percent
StronglyAgree
Mi
Section 5.2

5.19
o The user can either click a link or enter the webpage or click out. The sample
space of the website is the five individual links.
 5.21
a) The probability is .248
b) .752
 5.22
a) .107*.107=.0114
b) The complement of this event is o
Section 3.3

3.86
o 95% of the students fall within the range of 470 to 674.
3.87
o 99.7% of the students fall within the range of 419 to 725.
3.94
a) Standard Deviation = 3
b) Standard Deviation = 1
c) The normal curve gets narrower as the standard devi
1.8
a) 40 Students
b) 3 Students
c) No because the students chose to stay after class, they were not selected
d) No because only 3 of the 40 students chose to stay after class which is not a large
enough sample. Furthermore, they were biased as they may h
6.7
For the SRS of 400, the P hat would be closer to the actual value of P than the P hat for the SRS
of 200 and sampling distribution would be closer to normal than the SRS of 200 because the
sample size is greater
6.8
a) Standard deviation = sqrt (.5*.5
STATISTICAL INFERENCE
Chapter 9: Tests About Hypothesis
Hamdy Mahmoud
VT, Stat. Dep.
Motivation Example: Magic Water
The Five Steps of a Significance Test
p
1. Assumptions
In chapter 7, under what conditions the sample proportion, p
, has Normal distribu
2.3 Measuring the center of quantitative data
Learning Objectives
1.
2.
3.
4.
5.
Calculating the mean
Calculating the median
Comparing the mean
& median
Definition of resistant
Know how to identify
the mode of a
distribution
Mean
The mean is the sum of th
STAT3005 students performance
in HW1HW6
Great
Class!
Comparing two groups in Mean
( 1 2 )
1.Confidence interval for (1 2 )
We have two cases:
1. CASE 1:
1 2
2
2
( x1 x2 ) t / 2, df
2
s
(i. e. max 4 )
2
smin
s12
s22
n1
n2
Degree of freedom can be calcu
Jiayu Chen
04/26/2017
Money Habitudes
I really have learned a lot in this money habitudes. My dominant habitudes in this
project are defined as spontaneous and carefree. I totally agree with the results that I
am a spontaneous person.
I am not a guy that
Opening a Roth IRA Account
Jiayu Chen
05/03/2017
I think I will open a dodge&cox funds. Since I have no such experience before, I decided to take a fund
with lower risks. And I will not have too much time paying attention on it. As a result, I would like
INVESTMENT/SAVINGS APPS HANDOUTi
SAVINGS APS
DIGIT https:/digit.co/
Digit connects to your checking account and analyzes your spending and income.
Digit attempts to find the perfect amount you should save. Money you dont need to spend and that you
wont f
Adithya Saikumar
Test 2 Short Answer
STAT 3005 Summer I Session
The Housing Commission of Woodcreek County is interested in finding out more about the
number of rental units that do not meet standard living requirements in both Ridge Township and
Crystal
MATH 135 SPRING 2016
TEST 5 REVIEW
1. Do students in suburban schools spend a greater amount of time in extracurricular activities? A random
selection of students in both suburban and urban schools was conducted. Using the results below, test
whether subu
Lecture 65
Overview of Two Sample Procedures
Sampling Distribution for a Difference in
Proportions
LargeSample Confidence Interval for a
Difference in Proportions
Significance Test for a Difference in
Proportions
Overview
Twosample testing procedu
STAT 3005 On Line
Final Test
July 5, 2014
Take Home Final Test Directions
Please read carefully the following directions
1. You will submit your answers for this test on Scholar. You will have only one opportunity to submit the
test.
2. Complete this exam
Lecture 81
Determining Sample Sizes
Use and Abuse of Tests
Determining Sample Size
Choosing Sample Size to have a certain level of
precision, a fixed MOE
Very popular in polling applications like those
seen on MSNBC, Fox, CNN, etc.
A common question
Lecture 74
Sampling Distribution of the Difference of Two
Sample Means
The Pooled TwoSample Confidence Interval
The Pooled TwoSample Hypothesis Test
Sampling Distribution
GOAL:
Compare two populations where the
response is quantitative.
Examine th
Lecture 73
Matched Pairs Data
Confidence Intervals for Matched pairs Data
Hypothesis Tests for Matched Pairs Data
When to Pair
Robustness of the t Procedures
Matched Pairs Data
Comparative studies are more convincing than
singlesample investigations.
Lecture 53
Binomial Distribution
Motivation
Profiles of Some Binomial RVs
Formal Definition of the Binomial Distribution
Tree Diagrams
Motivation
One of the most important discrete distributions
Outcome is binary (yes/no, success/failure)
Example
Lecture 64
Overview of the Hypothesis Test for a Single
Proportion
Example
The reasoning of Tests of Significance
Overview of the Hypothesis Test for a Single
Proportion
This procedure assumes the normal
approximation to the binomial distribution.
T
Jiayu Chen
2.
A) (68+54+92+75+73+98+64+55+80+70)/10=72.9
The mean is 72.9.
The standard deviation is 14.29413
B) The sample minimum is 54
The lower quartile is 61.75
The median is 71.5
The upper quratile is 83
The sample maximum is 98
C)
D) 9873=25
E)For
HW3 Q8
Jiayu Chen
A)
B) The correlation coefficient is 0.519
The P value is 0.187
C) Since the correlation coefficient is 0.519 which is greater than 0.5, there is a correlation
between the second test score and the final score.
STAT3005 OnLine
Homework # 4
Summer I
You must show all of your work for each problem in order to receive full credit. Minitab should be
used when specified.
*Use the following problem to answer Q1 and Q2*
The statistics of a particular basketball playe
Note: Dividing the totals by the sample size, will give
us the marginal probabilities
Grade
Male
Female
Totals
A
46
17
63/89=0.71
B
15
8
23/89=0.26
C
2
1
3/89=0.03
Total
63/89=0.71 26/89=0.29
89
Probability of C
Probability of Male
Note: Dividing the numb