Stat 2510 Exam 2 Fall 2015
1. Suppose that the probability of being disconnected from AUWIFI is .2 and that we take a random sample of 5 users of
AU-WIFI. Find the probability that exactly 3 of the users will
be disconnected while trying to use the WIFI.
Stat 2510 Exam 2 Fall 2014
1. Thirty percent of adults who own cell phones use their phones
to send and receive text messages. Choose 4 cell phone owners
at random. What is the probability that at most 1 will use
their phone for texting.
a. .4116
b. .3483
Exam 1
Date: Feb. 26, 2016
Version 2
SOLUTION:
SCORE:
STAT-3610
Exam 1
Date: Feb. 26, 2016
STAT-3610
1. Suppose X1 , X2 , . . . , Xn are a random sample of size n observations from a N (, 2 ) population, where is
known but is unknown. Let = 2 , then we kn
STAT 3600 - 002
Fall 2015
Exam 1
Instructions:
This test consists of 5 questions. Please answer all questions to the best of your ability. Be as concise as
possible no points for random babbling. Be sure to show your work for the problems.
For the exam:
R
Practice Quiz 2
Quiz Date: Sep 3, 2015
NAME:
STAT-3610
SHOW ALL WORK
1. Suppose X is a Gamma random variable with shape parameter and scale parameter > 0, i.e., the pdf
is given as,
1
x1 ex/ , 0 < x < ,
(1)
f (x|, ) =
()
Z
where > 0, > 0 and (a) =
xa1 ex
Quiz 8: solution
Quiz Date: March 11, 2015
STAT-3610
NAME: SOLUTION
SHOW ALL WORK
1. In a certain political campaign, one candidate has a poll taken consisting of a random sample of size 351
from the voting population (an extremely large population). The
STAT 3600 - 002
Fall 2015
Exam 2
Instructions:
This test consists of 4 questions. Please answer all questions to the best of your ability. Be as concise as
possible no points for random babbling. Be sure to show your work for the problems.
For the exam:
R
Exam 2
Date: April 1, 2016
Version 1
NAME: INSTRUCTORS ANSWER KEY
SCORE: 100%
STAT-3610
Exam 2
Date: April 1, 2016
STAT-3610
1. (8.1-5) Suppose that it is known that the true mean birth weight of infants in the United States is 3315 grams.
To determine if
Quiz 5
Quiz Date: Feb 19, 2016
NAME: SOLUTION
STAT-3610
SHOW ALL WORK
1. Suppose X1 , X2 , . . . , Xn are a random sample from a Bernoulli () population, 0 < < 1. We wish to
use the sample to estimate the parameter p, i.e., the population proportion. The
Quiz 11(SOLUTION)
Quiz Date: Apr 15, 2016
NAME: SOLUTION
STAT-3610
SHOW ALL WORK
1. A particular brand of candy-coated chocolate comes in five different colors that we shall denote as A1 =
cfw_brown, A2 =cfw_yellow, A3 = cfw_orange, A4 = cfw_green, and A5
Exam 2
Date: Nov 12, 2015
Version 1
NAME: SOLUTION
SCORE:
STAT-3610
Exam 2
Date: Nov 12, 2015
STAT-3610
Questions 1-10 are multiple choice, circle only one indicating your response. The multiple choice problems are
worth 2 points each.
1. Assume that the
Quiz 9 (SOLUTION)
Quiz Date: Mar 25, 2016
NAME:
STAT-3610
SHOW ALL WORK
1. In attempting to control the strength of the wastes discharged into a nearby river, a paper firm
has taken a number of measures. Members of the firm believe that they have reduced
Exam 2
STAT 3610
May 5, 2015
Answer Key (abbreviated solutions)
Exam 2
Wednesday, April 15, 2015
STAT-3610
1. (30pts) A random sample of soil specimens was obtained and the amount of organic matter (%) in
the soil was determined for each specimen, resulti
Quiz 4
Quiz Date: Feb 12, 2015
NAME: SOLUTION
STAT-3610
SHOW ALL WORK
1. Suppose X1 , X2 , . . . , Xn are a random sample from a Poisson population with mean . We wish to use the
sample to estimate the parameter .
(a) Write out the parameter space for thi
Quiz 9 (prac1) SOLUTION
NAME: SOLUTION
Quiz Date:
STAT-3610
SHOW ALL WORK
1. Independent random samples of the heights of adult males living in two countries yielded the following
results: n = 13, x
= 65.7 inches, sx = 4 inches and m = 15, y = 68.2 inche
Practice Quiz 1
Quiz Date: August 27, 2015
STAT-3610
Here is an example of the type of problem that could be on the quiz. The quiz can come from any
one of the homework or related problems, including this one.
The weekly demand for propane gas (in 1000s o
Quiz 3
Quiz Date: Feb 5, 2015
NAME:
STAT-3610
SHOW ALL WORK
1. An Insurance company experience the following mobile home losses in 10,000s of dollars (x) for 50 catastrophe events:
1 2 2 3 3 4 4 5 5 5 5 6 7 7 9 9 9 10 11 12 22 24 28 29 31 33 36 38 38 38
3
Quiz 13
April 29, 2016
NAME: SOLUTION
Let Xi , i = 1, 2, 3, 4, equal the distance (in yards) that a golf ball travels when hit from a tee, where i denotes the
index of the ith manufacturer. We shall test the null hypothesis H0 : 1 = 2 = 3 = 4 , using the
Quiz 7
Quiz Date: Wed, March 9, 2016
NAME: SOLUTION
STAT-3610
SHOW ALL WORK
1. A test was conducted to determine whether a wedge on the end of a plug fitting designed to hold
a seal onto the plug was doing its job. The data taken were in the form of measu
Quiz 9 (prac2): solution
Quiz Date:
STAT-3610
NAME: SOLUTION
SHOW ALL WORK
1. In a certain political campaign, one candidate has a poll taken consisting of a random sample of size 351
from the voting population (an extremely large population). The results
Quiz 1 SOLUTION
Quiz Date: Jan 22, 2015
NAME:
SHOW ALL WORK
STAT-3610
Suppose X is an exponential random variable with mean > 0, i.e., the pdf is given as,
f (x|) =
1 x/
e
,
0 x < .
(1)
Z
1. Show that the area under the curve/density defined in (1) is equ
Quiz 6
Quiz Date: March 4, 2016
NAME: SOLUTION
STAT-3610
SHOW ALL WORK
1. A leakage test was conducted to determine the effectiveness of a seal designed to keep the inside of a plug
airtight. An air needle was inserted into the plug, and the plug and need
En nuestro viaje, vamos de Miami adonde?
En este viaje, vamos de Miami de Mxico, Amrica Central, la parte norte, Amrica del
Sur, y unas islas en el Mar Caribe.
Que vamos en Mxico?
Mxico es un pas muy bello y tambin es interesante. Pasamos por la pennsula
Todays lecture
Today we will continue our discussion of
Hypothesis testing
We will learn how to conduct a hypothesis test
for:
Two large sample means
Two small sample means
In Review Traditional Method
To conduct a hypothesis test using the
tradition
Todays lecture
Today we begin our discussion of Hypothesis testing
We will discuss the components of Hypothesis testing
We will also learn how to conduct specific hypothesis
tests
Large Sample Mean
Small Sample Mean
Proportion
Hypothesis Testing
Hy
Todays lecture
Today we continue our discussion of
applications using the Standard Normal
Distribution
Today we will be discussing Confidence
Intervals
In particular, a confidence interval for the mean
Both Large and Small Sample
A confidence interva
Todays lecture
Today we will introduce the concept of how
probabilities come about
We will discuss the following:
Basic Concepts
Sample Spaces
Counting Rules
Todays lecture
We will discuss the following:
Defining Probability
Using Counting Rules f
Todays lecture
Today we will begin our discussion of descriptive
measures
We will discuss the following:
Mathematical concepts
Summation & Factorial
Measures of Central Tendency
Mean
Median
Mode
Midpoint
Todays lecture
We will discuss the following:
Todays lecture
Today we will begin our discussion of the Standard
Normal Distribution
We will discussing:
The Standard Normal Distribution
Using the Standard Normal Distribution
Finding probability values using the Table E in Appendix C
Using z-scor
Todays lecture
Today we continue our discussion of the
Standard Normal Distribution
We will discussing:
Z-scores
percentiles
Central limit theorem
Normal approximation to the binomial
Normal Distribution
To review, we discussed the normal
distribut