Technology in Action, Complete 8e (Evans et al.) Stdnt Txt
Chapter 9: Securing Your System: Protecting Your Digital Data and Devices
1) A _ is a secure Internet pathway that large corporations use to protect sensitive
data.
VPN
2) Which of the following i
Math 330 Multivariate Data Analysis
Final Exam Takehome
Distributed Dec. 12, 2012
Due Dec. 21, 2009 by 5 p.m. to 306 SM (or faxed/emailed)
Instructions:
1. Your work should be presented as a write-up for the last 2 problems, and as sentence/short
answers
lHomework 3 due Thursday, Feb 11
Problem 1 (4.47) An experiment consists of tossing a single die and observing the number of dots that show on
the upper face. Events A, B and C are defined as follows:
A: Observe a number less than 4
B: Observe a number le
a.
Since there are so few measurements in each of the three groups, the best approach is to construct dotplots for the
three sets.
Dotplot of Times
Pontiac
Ford
Chevrolet
180.60
b.
180.95
181.30
181.65
182.00
Times
182.35
182.70
183.05
The range of the da
Homework 7 solution
1a. 100 rolls of two fair dice
Variable
N
N*
Mean
Mean (2)
100
Variable
Mean (2)
Maximum
5.500
0
3.415
SE Mean
0.111
StDev
Minimum
1.115
1.000
Q1
2.500
Median
3.500
Q3
4.000
Histogram (with Normal Curve) of Mean (2)
Mean
StDev
N
20
3.4
Homework 5 solution
1. This is a hypergeometric distribution again, someone can say this is a binomial setting . The answer is no, there are two possible
outcomes, but the probability of success changes and you can not assume independence. We sample witho
Homework 3 solution
1.
Refer to the solution to Exercise 4.1 where the six simple events in the experiment are given, with P( Ei ) = 1 6 .
a
S = cfw_ E1 , E2 , E3 , E4 , E5 , E6 and P(=
S ) 6=
6 1
b
=
P( A| B
)
c
B = cfw_ E1 , E2 and P(=
B) 2=
6 13
0
A
Homework 9 solution
Problem 1 (we should always check assumptions) : Random sample stated
N=10 , small sample , but population is normal
The population standard deviation is given
Problem 2 We should check assumptions : we have random, large samples indep
Homework 4 solution
1.
2a.
2b.
The probability table will look like:
Y
0
10
100
P(Y)
3/6
2/6
1/6
You can check: E(Y) = 0*3/6+10*2/6 +100*1/6=20
Var (Y)= ( 0-20)^2*3/6 + (10-20)^2*2/6+ (100-20)^2*1/6=1300
2c
The probability distribution looks like: Z=Y1+Y2
Homework 8 due Thursday, March 24
1.Recycling trash, reducing waste and reusing materials are ecu-friendly actions that will help the environment.
According to USA Today, 78% of respondents list recycling as the leading way to help our environment. Suppos
Handout 2. Describing Data with Numerical Measure.
A picture provides a global/qualitative description of
a sample.
Numerical measures can be created for both populations
and samples.
A parameter is a numerical descriptive measure calculated
. a populat
Handout 1 . Chapter 1.
What is statistics?
The word statistics has two meanings:
In the more common usage, statistics refers to numerical
facts. The numbers that represent the income of a family,
the age of a students
The second meaning of statistics r
Homework 1 due Thursday, Sept 14
1.The first 24 qualifying times for the inaugural race of the NASCAR Winston Cups California 500 are listed in the
table:
Pontiac
Chevrolet
Ford
181.607
183.015
182.209
182.927
181.018
181.493
182.894
181.915
182.482
180.9
Measures of Center
Handout 2. Describing Data with Numerical Measure.
A picture provides a global/qualitative description of
a sample.
A measure along the horizontal axis of the data distribution that
locates the center of the distribution.
The mode: i
9/5/2017
Handout 1 . Chapter 1.
What is statistics?
The word statistics has two meanings:
In the more common usage, statistics refers to numerical
facts. The numbers that represent the income of a
family, the age of a students
The second meaning of sta
Handout 1 . Chapter 1.
What is statistics?
The word statistics has two meanings:
In the more common usage, statistics refers to numerical
facts. The numbers that represent the income of a family,
the age of a students
The second meaning of statistics r
Homework 1
1.Body temperatures (in F) were measured on 30 healthy individuals, resulting in the data H1.1.
a) Make a histogram and a stem and leaf plot . Comment on the shape of distribution.
b) Calculate the mean, median ,mode and standard deviation.What
@jnm 1.54 Student Heights The self—reported
291-6151 heights of lﬂﬁ students in a biostatistics class
are described in the relative frequency histogram
below.
E
i
1
n:
:1. Describe the shape of the distribution.
b. Do you see any unusual feature in this
Handout 3.
Remember the objective:
Probability .
Why the price of a car insurance changes when you turn
Probability
24?
The price depends on how likely you are to have a car
accident. It is estimated that the shape of this likelihood
decreases as you gr
Handout 3.
Remember the objective:
Population
Probability
Probability .
Probability
Sample
Describe the
sample data
Compute measures of
variability
Probability
Why the price of a car insurance changes when you turn
24?
The price depends on how likely yo
Measures of Center
Handout 2. Describing Data with Numerical Measure.
A picture provides a global/qualitative description of
a sample.
A measure along the horizontal axis of the data distribution that
locates the center of the distribution.
The mode: i
DEPARTMENT OF MATHEMATICS AND STATISTICS
UNIVERSITY OF MASSACHUSETTS AT AMHERST
STAT 501 Methods of Applied Statistics
Fall 2015
Lectures: Tu, Th 2:30 3:45, LGRT 219
Professor: Joanna Jeneralczuk
Office: LGRT 1328
Phone: 545- 3128
Email: [email protected]
9/8/2015
Handout 1 . Chapter 1.
What is statistics?
The word statistics has two meanings:
In the more common usage, statistics refers to numerical
facts. The numbers that represent the income of a
family, the age of a students
The second meaning of sta
A marketing analyst is studying the relationship between 3;: money" spent on television advertisement.
and y: iiierease in sales, One study reported the data in the Figure below for a particular company.
Data are in thousands of dollars.
Fobfvc macho