Statistics
Homework#03
Fall 2007
-1.
A standard deck of cards contains 52 cards. There are 4 suits in the deck: 13 hearts, 13 diamonds, 13 clubs,
13 spades. Each suit has one ace, one two, one three, , one jack, one queen, and one king.
Consider the proba
Math227
1.
Fall 2007 (Key)
Homework#04
Four possible probability distribution functions for a discrete random variable are
shown in the table. For each, tell if the function is suitable for a probability
distribution function. If not, tell why not. If yes
Statistics
Homework#03
Fall 2007
( Key)
-1. A standard deck of cards contains 52 cards. There are 4 suits in the deck: 13
hearts, 13 diamonds, 13 clubs, 13 spades. Each suit has one ace, one two,
one three, , one jack, one queen, and one king. Consider th
Math227
Review for Final
Fall2008
Name:
I: Determine which of the four levels of measurement is most appropriate: Qualitative or Quantitative?
a.
Race of students in this class.
b.
The score in your last math class.
II: Determine whether the given values
Test of Hypotheses
Chap07
Dr. Ghamsary
Elementary Statistics
M. Ghamsary, Ph.D.
Chapter 07
Test of Hypothesis
1
Page 1
Test of Hypotheses Chap07
Dr. Ghamsary
Page 2
Test of Hypotheses:
In the previous chapter, we found that by computing a confidence inter
Elementary Statistics
Chapter 9
Dr. Ghamsary
Page 1
Elementary Statistics
M. Ghamsary, Ph.D.
Chapter 9
Correlation and Regression
1
Elementary Statistics
Chapter 9
Dr. Ghamsary
Page 2
Regression and Correlation
Correlation: is a measure of association (Us
Elementary Statistics
Chapter 5
Normal Distribution
Dr.Ghamsary Page 1
Elementary Statistics
M. Ghamsary, Ph.D.
Chapter 05
Normal Distribution
1
Elementary Statistics
Chapter 5
Normal Distribution
Dr.Ghamsary Page 2
Normal Distribution
One of the most com
Math227
Formula Sheet for Final Exam
n
Sample Variance : s
2
=
( x
i =1
i
x)
n 1
Dr. Ghamsary
2
or
s2 =
x
2
( x )
n 1
2
n
First rule of addition: P ( E F ) = P( E ) + P( F ) if E and F are
mutually exclusive events.
Second rule of addition: P ( E F ) =
Elementary Statistics Chapter 11
Dr. Ghamsary
Page 1
ANalysis Of Variance Test, ANOVA
ANOVA test is an extension of two sample independent t-test demonstrated how to
compare differences of means between two groups, such as comparing outcomes between
contr
Elementary Statistics Chap10
Dr. Ghamsary
Elementary Statistics
M. Ghamsary, Ph.D.
Chapter 10
Chi-square Test for Goodness of fit
and Contingency tables
Page 1
Elementary Statistics Chap10
Dr. Ghamsary
Page 2
Chi-Square Test
Generally speaking, the chi-sq
Elementary Statistics
Dr. Ghamsary
Chapter 2
Elementary Statistics
M. Ghamsary, Ph.D.
Chapter 02
1
Page 1
Elementary Statistics
Dr. Ghamsary
Chapter 2
Page 2
Descriptive Statistics
Grouped vs Ungrouped Data
Ungrouped data: have not been summarized in any
Two Sample Means
Chap08
Dr. Ghamsary
Page 1
Elementary Statistics
M. Ghamsary, Ph.D.
Chapter 8
Test of Hypothesis and Confidence Interval
for Two Sample
1
Two Sample Means
Chap08
Dr. Ghamsary
Page 2
Test of Hypothesis for Two sample:
A Statistical hypothe
Elementary Statistics Chapter 4
Dr. Ghamsary
Elementary Statistics
M. Ghamsary, Ph.D.
Chapter 04
Probability Distribution
For Discrete random variable
1
Page 1
Elementary Statistics Chapter 4
Dr. Ghamsary
Page 2
Probability Distributions
Random Variable:
Elementary Statistics
Chapter 1
Dr. Ghamsary
Elementary Statistics
M. Ghamsary, Ph.D.
Chap 01
1
Page 1
Elementary Statistics
Statistics:
Chapter 1
Dr. Ghamsary
Page 2
Statistics is the science of
collecting,
organizing,
summarizing,
analyzing data, an
Math 227
Fall 2007
Homework 9
KEY
-1: A pediatrician wants to determine the relation that may exist between a childs height and head
circumference. She randomly selects 11 children from her practice, measures their height and
head circumference, and obtai
Math 227
Fall 2006
Homework 10
KEY
-1.
Do you hate Mondays? A German study suggested that there was an increased risk of heart attack
on Mondays versus any other day of the week. To verify, 203 working people who had recently
had heart attacks were survey
Math 227
Fall 2007
Homework 11
Dr. Ghamsary KEY
-1. Researchers wanted to compare math test scores of students at the end of secondary school
from various countries. Eight randomly selected students from Canada, Denmark, and the
U.S. were administered the
Math227
Fall 2007
Homework#08
-1- Use the following to test the average age of males and females are significantly different (use 0.02 level of significant).
Also construct the 98% confidence interval for the difference of the means of the populati ons.
M
Math 227
Fall2008
Homework 9
-Special Instructions :
Do all problems by hand. In addition, do all problems using MINITAB. You may draw
regression lines by hand or using your computer generated plots, it is your choice.
1- The SAT and the ACT are the two m
Math 227
Fall2008
Homework 11
-1-A firm wishes to compare four programs for training workers to perform a certain
manual task. Twenty new employees are randomly assigned to the training programs,
with 5 in each program. At the end of the training period,
Math 227 FAll2008
Homework 10
-1-A bank manager wishes to see whether there is any preference in the times that
customers use the bank. Six hours are selected, and the numbers of customers visiting the
bank during each hour are as shown below:
Time
Freque
Homework#6:Key Fall 2007
-1- A random sample of 40 of the paid attendances is shown
A-Find the 95% confidence interval for the mean age attendance at the Major League All Star
games.
B-Find the 95% confidence interval for the standard deviation age attend
Statistics
Fall 2007
Homework#07
Key
- -1- Test H0: = 70 versus H1: < 70. To do this, a random sample of size n = 20 gives x 66.9
and is obtained from a population that is known to be normally distributed with = 11. Please give the 3 steps, as we
discusse
MATH227
Fall 2009
HWK#08
- -1- The following data is sampled from a normal population.
Male
Female
n 12
n 16
x 75
x 77
10
8
A- To test the average age of males and females are significantly different (use 0.03 level of significant).
B- Also construct th