CHOSUN UNIVERSITY SEOK-GANG,PARK
CHAPTER 2 SECTION 1: GRAPHICAL AND TABULAR DESCRIPTIVE
TECHNIQUES
MULTIPLE CHOICE
1. The classification of student major (accounting, economics, management, marketing,
Practice problems for Exam 1
1._ You take a random sample of 100 students at your university and find that their average
GPA is 3.1. If you use this information to help you estimate the average GPA fo
Chapter 7
7.1 a 0, 1, 2,
b Yes, we can identify the first value (0), the second (1), and so on.
c It is finite, because the number of cars is finite.
d The variable is discrete because it is countabl
Chapter 9
9.1a. 1/6
b. 1/6
9.2 a P( X = 1) =P(1,1)= 1/36
b P( X = 6) = P(6,6) = 1/36
9.3a P( X = 1) = (1/6) 5 = .0001286
b P( X = 6) = (1/6) 5 = .0001286
9.4 The variance of X is smaller than the vari
Chapter 10
10.1 A point estimator is a single value; an interval estimator is a range of values.
10.2 An unbiased estimator of a parameter is an estimator whose expected value equals the
parameter.
10
Statistics
Prof. Peiran Jiao
Homework 4
Part I. True or False
Write your answers here:
1.
Since there is an infinite number of values a continuous random variable can assume, the
probability of each i
Statistics
Prof. Peiran Jiao
Homework 4
This homework is due on Wednesday, Oct 16 in class.
Part I. True or False
Write your answers here:
1.
Since there is an infinite number of values a continuous r
Statistics
Prof. Peiran Jiao
Homework 3 Answers
Part I. True or False
Write your answers here:
FFFFF TFTF
1.
P(A) + P(B) = 1 for any events A and B that are mutually exclusive.
Ans: F
2.
The mean of a
Statistics
Prof. Peiran Jiao
Homework 3
Due Wednesday Oct 9 in class.
Part I. True or False
Write your answers here:
1.
P(A) + P(B) = 1 for any events A and B that are mutually exclusive.
2.
The mean
QuantitativeandStatisticalAnalysis
JiaoFall2013
Prof.Peiran
Homework2
ThishomeworkisdueonSept18inclass.Pleasesubmitahardcopy.
PartI.TrueorFalse
1. A data sample has a mean of 107, a median of 122, and
AnswerKeytoHW2
PartI
FTFFFTFTF
PartII
BDACDBBC
1.
PartIII
The number of hours a college student spent studying during the final exam week was
recorded as follows: 7, 6, 4, 9, 8, 5, and 10. Compute s2
Chapter 2
2.1 Nominal: Occupation, undergraduate major. Ordinal: Rating of university professor, Taste test
ratings. Interval: age, income
2.2 a Interval
b Interval
c Nominal
d Ordinal
2.3 a Interval
Quantitative and Statistical Analysis
Jiao Fall 2013
Prof. Peiran
Homework 1
This homework is due on Sept 11 in class. Please submit a hard copy.
To answer these questions, you dont need to copy and p
Name: _ Class: _ Date: _
Econ205_Midterm1_A
Multiple Choice
Identify the choice that best completes the statement or answers the question.
_
1. Which of the following represents a graphical presentati
CHOSUN UNIVERSITY SEOK-GANG,PARK
CHAPTER 4 SECTION 1: NUMERICAL DESCRIPTIVE TECHNIQUES
MULTIPLE CHOICE
1. Which of the following statistics is a measure of central location?
a. The mean
b. The median
CHOSUN UNIVERSITY SEOK-GANG.PARK
CHAPTER 3 SECTION 1-2: ART AND SCIENCE OF GRAPHICAL
PRESENTATIONS
MULTIPLE CHOICE
1. The effect of making the slope of a line chart appear steeper can be created by:
a
CHOSUN UNIVERSITY-SEOK-GANG,PARK
CHAPTER 1 SECTION 1: WHAT IS STATISTICS?
MULTIPLE CHOICE
1. You take a random sample of 100 students at your university and find that their average GPA is 3.1. If
you