Data Analysis Spring 2009 Final Exam
May 4
3:00 5:00 PM
Please read carefully: This is a comprehensive multiple choice final exam. You are to answer the
questions on your own. You may use your book, your bound materials, a calculator, and a pencil. You
ma
Six steps to Hypothesis testing: (does not work for confidence intervals) 1. Research problem stated in reference to the alternative hypothesis in common discourse language 2. Statistical hypothesis (see below) 3. decision rule - written out and draw a pi
Homework 11
Name: Eric Nelson
Directions: Using the Bivariate Regression Data Set, predict the number of times an employee is
a group leader for a project by using the number of times he/she was a group member on
projects. Do a write up, including all of
Data Analysis Spring 2009 Final Exam
May 4
3:00 5:00 PM
Please read carefully: This is a comprehensive multiple choice final exam. You are to answer
the questions on your own. You may use your book, your bound materials, a calculator, and
a pencil. You ma
Data Analysis Spring 2009 Final Exam
May 4
3:00 5:00 PM
Please read carefully: This is a comprehensive multiple choice final exam. You are to answer
the questions on your own. You may use your book, your bound materials, a calculator, and
a pencil. You ma
Use the following information for the next 4 questions:
The incomes of Canadian residents are normally distributed with a mean of $40,000 and a
standard deviation of $6,000.
1. What is the probability that a randomly selected Canadian resident will have a
WCOB 1033: Fall 2014
Exam 1 Practice Problems
Use the scenario below for the following 4 questions.
The University of Arkansas bookstore has decided to use a customer satisfaction
survey to learn more about customers experiences with the bookstore. The su
Data Analysis
Important Pages and Graphs
P.71 distribution shapes
P. 121 skewed data
Definitions
Statistics- the science of allocating, organizing, analyzing, interpreting, and presenting data
Descriptive stat- the allocation, presentation, and summary of
Leader: Jun Nguyen
Email: [email protected]
Chapter 4: Descriptive Statistics
1. Central Location
Mean ( or )=
Ex: 3, 8,5,10,4,10
= =5
Influenced by outliers or extreme value, good measurement for normal data
Median : middle value in sorted array
Ex: 1
Regression Statistics Multiple R 0.81 Correlation Coefficient R Square 0.65 Correlation Coefficient squared Adjusted R Square 0.65 Standard Error 303.14 (SSE) Closer to Zero the better the fit of the line because there is less error unaccounted for Observ
Spring 2015: Practice Problems for Exam 2
WCOB 1033: Data Analysis and Interpretation
The citizens of Krakodja (a country in Eastern Europe), have an average productivity of 9 hours per work
day. The government has started a policy for improving the produ
WCOB 1033 Data Analysis and Interpretation
Final Exam
May 12th, 2011
FORM A
(Important: Write this on your answer sheet next to your name)
Please read and follow these instructions carefully
1.
2.
3.
4.
5.
6.
Print your name on this test booklet and on th
Use the following information for the next 4 questions:
The incomes of Canadian residents are normally distributed with a mean of $40,000 and a
standard deviation of $6,000.
1. What is the probability that a randomly selected Canadian resident will have a
Employee Aggression Score 1 - 100, higher scores = more aggression
Mean
Standard Error
Median
Mode
Standard Deviation
Sample Variance
Kurtosis
Skewness
Range
Minimum
Maximum
Sum
Count
47.45013
0.777178
50
50
15.3677
236.1661
0.620977
-0.326217
80
10
90
18
WCOB 1033 018 Exam I Practice
1. A summary measure that is computed from a sample to describe a
characteristic of the population is called
a. a parameter
b. a statistic
c. a population
d. Both a and c since they are the same
2. You asked five of your clas
BryanRedd
Homework#21
.Problem
1. An inspector for the Atlantic City Gaming Commission suspects that a particular
blackjack dealer may be cheating (in favor of the casino) when he deals at expensive tables. To
test her belief, she observed 500 hands at th
FINAL EXAM CHEAT SHEET WCOB 1033
Chapter 6: Finding the probability of a value/event with population only
Z=(x-)/
OR
X=+Z
Chapter 7: finding the probability of a value with a population and a sample
Part a: sample mean is more/less than population mean
Data Analysis Unit 1
Statistics: the science of collecting, organizing, analyzing, interpreting, and presenting
data.
Statistic: a single measure used to summarize a sample data set
Two types of Statistics:
1) Descriptive statistic: the collection, organi
Independent & Dependent VariablesSee if you can determine how many criteria for causation are fulfilled for each of the below examples Independent Variables (IV) & Dependent Variables (DV) In an experiment, the independent variable is the variable that is
Use the following information for the next 4 questions:
The incomes of Canadian residents are normally distributed with a mean of $40,000 and a
standard deviation of $6,000.
1. What is the probability that a randomly selected Canadian resident will have a
Data Analysis Spring 2012 Final Exam
May 10th
6:00- 8:00pm
Version A
Please read carefully: This is a comprehensive final exam. You are to answer the questions on
your own. You may use your book, your bound materials, a calculator, and a pencil. You may
w
Data Analysis Spring 2013 Final Exam
May
6:00- 8:00pm
Version A
Please read carefully:
This is a comprehensive final exam. You are to answer the questions on your own. You may
use your book, your bound materials, a calculator, and a pencil. You may write
Data Analysis Fall 2013 Final Exam
December 19 (6:00- 8:00pm)
Version A
Please read carefully:
This is a comprehensive final exam. You are to answer the questions on your own. You may
use your book, your bound materials, a calculator, and a pencil. You ma
Creating the Regression Line
DEFINITIONS:
b1 - This is the SLOPE of the regression line. Thus this is the amount that the Y variable
(dependent) will change for each 1 unit change in the X variable.
b0 - This is the intercept of the regression line with t
Using Your TI-83/84 Calculator for Hypothesis Testing:
The One-Sample t Test
Dr. Laura Schultz
The one-sample t test is used to test hypotheses regarding population means. This handout will take
you through one of the examples we will be considering durin
t Table
cum. prob
t .50
t .75
t .80
t .85
t .90
t .95
t .975
t .99
t .995
t .999
t .9995
one-tail
0.50
1.00
0.25
0.50
0.20
0.40
0.15
0.30
0.10
0.20
0.05
0.10
0.025
0.05
0.01
0.02
0.005
0.01
0.001
0.002
0.0005
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.00
Exam 3
Overview
I.
Testing the difference between two independent means
II.
Testing the difference between two matched means
III.
Testing the difference between three or more population means
IV.
Testing the difference between two proportions
V.
Interpret