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STA 301 – Applied Statistics
Spring 2008, Section B
Homework #1
Due Friday, January 25
Question 1
:
At the end of a semester, an instructor compiles his final grade
distribution, resulting in the table below:
Grade
% Students
A
25
B
30
C
25
D
15
F
5
This summary of class grades is an application of:
Choose one:
(a)
descriptive statistics
(b)
inferential statistics
Question 2
:
Census—pros and cons
(a)
What is a census?
(b)
When might a census be useful?
(c)
When might a census be a bad idea?
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Homework 1
Page 2 of 3
Question 3
:
A student would like to determine the average ACT score for incoming
freshman at his school, but this information has not yet been published.
He determines a
way to obtain a simple random sample of 250 students, and learns that their average score
is 25.3.
(a)
This overriding purpose of this study is an application of:
Choose one:
(i)
descriptive statistics
(ii)
inferential statistics
(b)
What is the population of interest in this problem?
(c)
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 Spring '08
 Noe
 Statistics

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