STAT 2610
Exam 2 review
Spring 2010
1. If the null hypothesis is false it is impossible to commit a Type I error. True or false?
a. True
b. False
Use the following information to answer the next two questions
The level of calcium in the blood of healthy y
Name:_ Lab time _Section:_
STAT 2610
Exam 1
Version 1
Fall 2004
Bubble in the version of the exam you are doing in the space provided on your
scantron sheet. In answering the questions select the best alternative.
Use the following information to answer t
Question 1
2.5 out of 2.5 points
The
collection of
all elements
of interest
in a
particular
study is
Question 2
2.5 out of 2.5 points
Which of
the
following
variables
use
the ordinal
scale of
measureme
nt?
Question 3
2.5 out of 2.5 points
Which data
woul
Exam 1 Practice Problem Solutions
1.
(a) s = 4.10 inches; s2 = (4.10)2 = 16.82 inches.
(b) Using the quartiles in the five-number summary, Q1 represents the 25th percentile. So,
approximately 25% of the students from the survey was below 66 inches.
(c) Be
Thomas P. Lewis
Business Stats
Chapter 7 Hw
2.
a. He is saying that we will have a really harsh winter so enjoy the warm days
now because cold weather is coming. There is no validity in has statement
because it is complete opinion and there is no way to p
Business Analytics
Chapter 7Randomness and Probability
Random Phenomena:
a phenonmenon is random if we know the possible
outcoes but not which outcome will actually take place
When shoppers at Kroger present their Kroger Card, the cashier is given
a messa
Thomas P. Lewis
Business Stats
Chapter 6 HW
1.
a.
Explanatory Variable: Number of text messages. Response Variable: Cost.
The scatter plot will show a positive relationship and could have a few outliers
if some companies have a fixed texting rate.
b. Expl
Thomas P. Lewis
Business Stats
Chapter 4 HW
5.
a. Yes because the individual categories divide a whole category.
b. Coca-Cola
7.
a. The pie chart is better because it is better at showing portions in a whole.
b. There is not an other category presented.
9
Thomas P. Lewis
Business Stats
Chapter 3 HW
3a. Voluntary Response
3b. This is not an accurate way to determine the percentage because such a small portion
of the population is being tested and it leads to skewed statistics.
4a. Simple Random Samples
4b.
Thomas P. Lewis
Business Stats
Chapter 2
7.
Who: Arbys
What: Type of meat, number of calories, and serving Size
When: not given
Where: Arbys Stores
Why: Nutritional Value of different sandwiches
How: Information from each sandwich was gathered
Variables:
Thomas P. Lewis
Business Stats
Chapter 8 HW
1.
a. All values that begin at 1 and end at n. (1,2,3,4,5,6n)
b. Discrete
2.
a. Any number that is larger than zero all the way up to Y
b. Continuous
5.
a. (30%*$10)+(50%+$20)+(20%+$30)= 19
10.
a. $15,000
11.
a.
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Exam 1 Practice Problems
Here are a few problems to help build your skills for the exam. These are NOT intended to
constitute all possible ways to construct problems relating to your exam material. You need
to study your lectures slides, notes, textbook,
Exam 2 Practice Problem Solutions
1.
a. 0.8592
b. 0.8592 = 0.9269
c. The intercept term is $172,551. This implies that the predicted price of a home with 0 square
feet is $172,551. Clearly this is an extrapolation because we have no homes in our sample
th
STAT 2610
Lecture 25
5/2/05
Final Exam is Tuesday, May 10 from 11 a.m.-1:30 p.m. in room
125 (your normal classroom). Formula sheet and review
problems are posted on the course website
Final Case Analysis
We have a data set based on several aspects of 199
STAT 2610
Lecture 20
4/13/05
Objectives:
1. Understand how to conduct a hypothesis test for comparing
two population means with independent samples.
2. You should be able to recognize when to conduct this test.
3. You should be able to draw valid conclusi
STAT 2610
Lecture 1
1/12/05
Learning Objectives:
1. Understand the fundamental idea behind statistics
2. Understand the difference between a population and a
sample
3. Understand the basic difference between statistical inference
and descriptive statistic
STAT 2610
Final Exam Version 1
Name: _
Fall 2003
Friday Lab Time: _
Bubble in the version of the exam you are doing in the space provided on your scantron sheet. In answering
the questions, select the best alternative. The exam contains 30 questions; each
Final Exam Practice Problems
The following data set consists of data gathered from 77 popular breakfast cereals. The variables
in the data set are as follows:
Brand: The brand name of the cereal
Calories: The number of calories per serving
Protein: The nu
Final Exam Practice Problem Answers
The following data set consists of data gathered from 77 popular breakfast cereals. The variables
in the data set are as follows:
Brand: The brand name of the cereal
Calories: The number of calories per serving
Protein:
Final Exam Formula Sheet
(This is a copy for you to use in studying. Do not bring it to use during the exam.
We will give you a clean copy for the exam.)
Sample Variance
s
2
(x x )
=
2
n 1
=
Sample Standard Deviation
( x)
n 1
2
x
or t =
n
x
s
n
x z*
Hyp
STAT 2610
Exam 3 Version 1
Name _
Fall 2004
Friday Lab Time _
Bubble in the version of the exam you are doing in the space provided on your scantron sheet. In
answering the questions, select the best alternative. The exam contains 19 questions; each with
Name:_ Lab time _Section:_
STAT 2610
Exam 2
Version 1
Fall 2004
Bubble in the version of the exam you are doing in the space provided on your scantron
sheet. In answering the questions select the best alternative.
According to a survey, subscribers to The
Exam 3 Practice Problems
Here are a few problems from the material covered for Exam 2 to help build your skills. These
are not intended to constitute all possible ways to construct problems relating to your exam
material or to cover all of the material wh
Exam 3 Practice Problem Solutions
1.
The number of phone calls your business receives daily has a mean of 20.3 with a
known standard deviation of 4.3. A random sample of 100 days is taken and the
sample mean is calculated. What is the probability of obtai
Exam 2 Practice Problems
Here are a few problems from the material covered for Exam 2 to help build your skills. These are not
intended to constitute all possible ways to construct problems relating to your exam material or to cover
all of the material wh