GMAT ?
PROBLEM SOLVING
SECTION 1
30 Minutes (20 Questions)
(D) $0.75
(E) $0.90
1. The 180 students in a group are to be
seated in rows so that there is an equal
number of students in each row. Each of
3.4
Distribution of the function of Random Variables
Often we find that after we compute the distribution of a random variable
X, we really want the distribution of some function of X. For example, if
GMAT ?
?
SECTION 20
25 Minutes 22 Questions
1. The black hole has entered the popular imagination as
an object too massive that neither light nor matter can
escape its gravitational pull.
a time durin
GMAT
DATA SUFFICIENCY
Section 16
25 Minutes 20 Questions
even.
(2) The sum of P 3, P, and P + 11 is
odd.
1. Is x greater than 75 percent of y ?
(1) x = 40
(2) y = 50
7. If a certain grove consists of
6/19/13
Area of Circle, Triangle, Square, Rectangle, Parallelogram, Trapezium, Ellipse and Sector
Area of Plane Shapes
Learn more about Area, or try the Area Calculator.
Triangle
Square
Area = b h
Are
Area
Sum of first N integers = n(n+1)/2
Square = a2
Sum of first N odd integers = n2
Rectangle = ab
Sum of first N even integers = n(n+1)
Triangle = hb/2
Longest diagonal in a Cube = a
Trapezoid = (a+
SAT Math Must-Know Facts & Formulas Numbers, Sequences, Factors
Integers: Rationals: Reals: Order Of Operations: . . . , -3, -2, -1, 0, 1, 2, 3, . . . fractions, that is, anything expressable as a rat
a long face
appeal to
'Why have you got such a long face?' 'I just
lost all my money in the casino.'
The idea of a vacation to Florida this winter
appeals to me a lot.
ability to
are in danger of
Corr
GMAT ?
PROBLEM SOLVING
Section 21
30 Minutes 20 Questions
$18,000 and the total monthly payroll for
the 36 office workers is $63,000. By how
much does the average (arithmetic mean)
monthly salary of a
GMAT
DATA SUFFICIENCY
Section 11
30 Minutes 25 Questions
xamination. If
passed the physical examination also
passed the written examination, how many
of the applicants passed both examinations
?
(1)
GMAT ?
?
CRITICAL REASONING TEST SECTION 1
30 Minutes 20 Questions
1. Nearly one in three subscribers to Financial Forecaster
is
a millionaire, and over half are in top management.
Shouldnt you subscr
GMAT
DATA SUFFICIENCY
SECTION 8
30 Minutes 25 Questions
1. Committee member W wants to schedule
a one-hour meeting on Thursday for
himself and three other committee
members, X,Y, and Z, Is there a on
Cha 8 Estimation
The previous chapter has pointed out that the basic
problem of mathematical statistics is inferring the distribution
of
totality through sample, which is called statistical
inference.
Cha 3.3 Continuous Random Variables and
Probability Distributions
As mentioned at the beginning of
Chapter 3, not all random variables are
discrete. In this section, we study the
second general type o
Probability and
statistics
Textbook
probability and statistics
Jay L. Devore
Higher Education Press
References
Introduction to probability and statistics
for engineers and scientists Henry L
Ald
4.5 CONDITIONAL DISTRIBUTIONS
The relationships between two random
variables can mainly be divided into two
types: independent or dependent.
In many situations, the value of X or Y is
an influence on
5.2 Variance
Example Both of Mike and Mary had
six math tests, their scores were
Mike 10, 7, 9, 8, 10, 6,
Five different
Mary
Four different
8, 7, 10, 9, 8, 8,
Who is better
Solution.
Firstly, compa
3.3
Continuous Random Variables and Probability
Distributions
As mentioned at the beginning of Chapter 3, not all random
variables are discrete. In this chapter, we study the second
general type of ra
Chapter 3. Random Variables and Distributions
Whether an experiment yields qualitative or quantitative outcomes,
methods of statistical analysis require that we focus on certain numerical aspects
of t
GMAT
DATA SUFFICIENCY
GMAT
DATA SUFFICIENCY
115
GMAT
DATA SUFFICIENCY
SECTION 1
30 Minutes 25 Questions
1. If today the price of an item is $3,600,
what was the price of the item exactly 2
years ag
GMAT
DATA SUFFICIENCY
SECTIION 5
30 minutes 25 questions
price of a certain house, what was the
selling price of the house?
(1) The selling price minus the real estate
agents commission was $84,600.
Ch5-1
?
Ch5-2
?
?,
Y1 , Y2 ,L , Yn ,L
? "e > 0 ?
a ?,
lim P ( Yn - a e ) =0
n
(?
lim P ( Yn - a <e ) =1
n
?
)
Y1 , Y2 ,L , Yn ,L
? a , ?
P
Yn
n
a
?
2 ?
Ch5-3
Bernoulli ?:
? n A ? n ? A ?
? , p ? A
Preface
These Notes on Differential Equations are an introduction and invitation. The focus
is on
1. important models
2. calculus (review?) in applied contexts
I may point out that the title is not So
3
2
1
0
-1
-2
-3
-2
0
2
4
6
8
10
Figure 2: The slope eld for Problem 2.
2
A Gallery of Differential Equations
T ODAY: A gallery is a place to look and to get ideas, and to nd out how
other people view
20
15
10
5
0
-5
0
10
20
30
40
50
60
70
80
Figure 1: The slope eld for y = .01y as made by an octave script as on page 18. A
solution starting from y(0) = 8 is also shown.
There is also a way to explic