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Economics 120A
Name:
_________________________
Professor Yongil Jeon
Summer 20082
Student ID#: ___________keys__________
Answer key to Homework #1 – Summer 2008Session 2, Econ 120A
(Exam #1 and a part of Exam #2, Winter 2008, Econ 120A)
Answer all questions on separate paper. This problem set should be handed in to your TA
at the
beginning of your discussion session on Friday, August 15, 2008
.
Problem sets may not be
handed in once solutions have been distributed.
Please write down your name and PID clearly.
Good luck!
1. Multiple Choices (2 points each – 34 points total)
(1).
Qualitative data
a.
indicate either how much or how many
b.
can not be numeric
c.
are labels used to identify attributes of elements
d. must be nonnumeric
Answer:
c
(2).
The collection of all elements of interest in a particular study is
a. the population
b. the sampling
c. statistical inference
d. descriptive statistics
Answer:
a
(3).
Since a sample is a subset of the population, the sample mean
a.
is always smaller than the mean of the population
b.
is always larger than the mean of the population
c.
must be equal to the mean of the population
d.
can be larger, smaller, or equal to the mean of the population
Answer:
d
(4).
The sum of the relative frequencies for all classes will always equal
a.
the sample size
b.
the number of classes
c. one
d.
any value larger than one
Answer:
c
(5).
Since the population size is always larger than the sample size, then the sample
statistic
a.
can never be larger than the population parameter
b.
can never be equal to the population parameter
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Answer to HW#1, ECON 120A, Summer 20082
c.
can be smaller, larger, or equal to the population parameter
d.
can never be smaller than the population parameter
Answer:
c
(6).
The median is a measure of
a. relative dispersion
b. absolute dispersion
c. central location
d. relative location
Answer:
c
(7).
The difference between the largest and the smallest data values is the
a. variance
b. interquartile range
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 Spring '08
 Jeyeon
 Economics

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