SECTION 6.3 The Sampling Distribution of and the Central Limit Theorem
is not effective in reducing sleep times,
then the distribution of sleep times will
be no different from the distribution
with the placeboThat is, if the drug is
abtive, the mean and s
Your name
Recitation Section:
(By signing your name here, you agree to abide by the GWU code of academic integrity.)
STAT 1053, Section 12, Fall 2017
Quiz 1 - Version A
Time: 15 minutes
Thursday, 09/07/17
1. (2+6=8 points) The primary objective of a study
\
Your name
Time: 20 minutes
1. (3 points) An urn contains 7 white, 5 blue and 8 red Inarble;
random without replacement from the urn. Let Y be the n-
samole. Does Y follow a binomial distribution? Exnlain
0,11. b. ,3: My a mmm
cm 134% ' I
A
,. .v a 00 e
I will post an announcement about the next quiz (3/22), on smallsample CI for .
I posted an announcement yesterday about some people turning in
HW based on exercises from the wrong edition we use the
Thirteenth edition.
As stated in class, DO NOT use the
Your name _-_-L_Recitation Section: _
cfw_11v .Ilgnhw, yum numu horn, ynu ngroo to abide by tlm GWU no'du ul ncndnmljc illtugrlty]
STAT 1053.12 Fall 2017 Quiz 5 Version B
Time: 20 minutes Thursday, 10/12/17
1. (3 points) An urn contains 7 white, 5 blue
Solution
(b) No. Mutually exclusive means two events can not happen at the same time. When A
occurs, B will not occur; When A doesnt occur, B must occur. Therefore, whether B
occurs depends on A, and A also depend on B, which means A and B are not indepen
4. 0.9 % percent of the US population are HIV positive. A test for HIV can yield either positive
or negative results. Given that a person has HIV, the probability of a positive result is 0.99
and the probability of a false positive is 2%. Suppose a person
GEORGE WASHINGTON UNIVERSITY
Department of Statistics
STAT 1053, Section 12, Fall 2017
Worksheet
1. Seventy percent of all women who submit to pregancy tests are really pregnant. A certain
pregnancy test gives a false positive result with probability 0.03
Your name (By signing your name here, you agree to abide by the GWU code of academic integrity.)
Recitation Section:
STAT 1053.12 Fall 2017 Quiz 5 Version A
Time: 20 minutes
Thursday, 10/12/17
1. (3 points) An urn contains 7 white, 5 blue and 8 red marble
Your name _._-RB tatfon Ewirma .4;
hide by the GWU code of need-mic Integrity.) . _
(By signing your name hurt, you ugroe to I
, ,
STAT 1053.12 Fall 2017 Quiz 5 Version C
Time: 20 minutes
1. (3 points) An urn contains 7 white, 5 blue and 8 red marbles. S
256 CHAPTER 5 Continuous Random Variables
Exercises 5.735.92
Understanding the Principles
5.73 For large n (say, it = 100),why is it advantageous to use the
normal distribution to approximate a binomial probability-'2 the Natural Resources Defense Council
Name.
SOLUTIONS TO SAMPLE FINAL EXAM
STAT 1053-12
SPRING 2013
Answer all questions. Please show full work for partial credit. The students must honor
the GW code of academic integrity during the exam.
1) A sample of eight workers in a clothing manufacturi
I have posted HW 4, due Wednesday April 12th.
It includes a problem on material that we will cover today.
Hypothesis tests for difference of population means
Large, independent samples
Section 9.2, pp 438-439. Just after the CI material in the same
sectio
I have posted an announcement on Blackboard about next weeks
quiz on CIs (Confidence Intervals) for and p.
HW 2 is due in discussion on Wed 3/8.
Recall
Formula for large-sample CI for (Section 7.2)
100(1- )% CI for is
(X- z /2 x , X+ z /2 x ),
where z /2
There will be a quiz in class next week, in your discussion section.
It is closed book, closed notes, but bring your calculator (just the basic
arithmetic operations plus squares and square roots.)
I will post information on Blackboard about it.
The tempe
The first HW will be due next week in discussion on Wed 2/15
see Blackboard.
I will post an announcement on Blackboard about next weeks
quiz.
We went over discrete random variables. Now we consider a
particular discrete random variable the Binomial.
(Sec
Next weeks quiz in discussion will be on the binomial.
The standard example of a binomial rv is the number of heads in n
tosses of a coin. The tosses are independent, and the probability of
head is the same for each toss.
We worked through an example with
The quiz will be in discussion on Wednesday.
The quiz will be on measures of central tendency and measures of
variability; i.e. mean, median, range, standard deviation and
variance. I announced some practice exercises in class on Tuesday
and I will announ
Today, we will talk about independence of events (sec 3.6),
review probability, and move on to discrete random variables
(Chapter 4).
Discrete random variables will be on next weeks quiz.
Independence
Events A and B are independent events if the occurrenc
The final will be in this classroom (1957 E, Rm 113)
I will come to class Tuesday 4/25 for questions you may have;
there will not be class on Thursday 4/27.
Last thing from Regression and Correlation is the definition of
correlation.
r= SSxy / (SSxx SSyy)
Take Home Quiz 10
(Due on Friday, May 2, 2014 in the class)
STAT 1053-12
SPRING 2014
NAME
Please show work for partial credit.
1) A random sample of 100 observations produced a sample mean of 35.6 with a standard
deviation of 3. At a 5% level of significa
Nowwe use the cumulative prob
_ abilities in Figure SIA5.2 to find the
three hit probabilities when 0' 2 4:
=P(x$6)wP(x4)
= .5987 e .4013 = .1974
. r7.1587 m .0668 : .0919
P(95x311)=P(x511)P(1S9)
: .9332 .8413 = .0919
wien 0 = 4, there is about a 20% chan
Name.
SAMPLE FINAL EXAM
STAT 1053-12
SPRING 2013
TIME: 2 HOURS
Answer all questions. Please show full work for partial credit. The students must honor
the GW code of academic integrity during the exam.
1) A sample of eight workers in a clothing manufactur