Practice Problems And Exams 2013

Practice Problems and Exams

1

The Islamic University of Gaza
Faculty of Commerce
Department of Economics and Political Sciences

An Introduction to Statistics Course (ECOE 1302)
Spring Semester 2009-2010
Chapter 1 - Introduction and Data Collection
Practice Exam - Solution
Instructors: Dr. Samir Safi

Mr. Ibrahim Abed

SECTION I: MULTIPLE-CHOICE
1. The universe or "totality of items or things" under consideration is called
a) a sample.
b) a population.
c) a parameter.
d) a statistic.
2. A summary measure that is computed to describe a characteristic of an entire population is called
a) a parameter.
b) a census.
c) a statistic.
d) the scientific method.

3. Which of the following is a discrete quantitative variable?
a) The Dow Jones Industrial average
b) The volume of water released from a dam
c) The distance you drove yesterday.
d) The number of employees of an insurance company
4. The classification of student class designation (freshman, sophomore, junior, senior) is an example of
a) a categorical random variable.
b) a discrete random variable.
c) a continuous random variable.
d) a parameter.

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SECTION II: TRUE OR FALSE
1. A sample is the portion of the universe that is selected for analysis.
True
2. The possible responses to the question “How long have you been living at your current residence?” are values from a continuous variable.
True
3. A continuous variable may take on any value within its relevant range even though the measurement device may not be precise enough to record it.
True
4. Student grades (A to F) are an example of continuous numerical data.
False
5. A statistic is usually unobservable while a parameter is usually observable.
False
6. The answer to the question “How do you rate the quality of your business statistics course” is an example of an ordinal scaled variable.
True
7. The type of TV one owns is an example of a numerical variable.
False
8. Whether the university is private or public is an example of a categorical variable.
True
9.