Statistics for Management and Economics (Book Only)
11th Edition
ISBN: 9781337296946
Author: Gerald Keller
Publisher: Cengage Learning
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Chapter 5.2, Problem 8E
a:
To determine
Self-selected sample:
b:
To determine
Reasons for incorrect prediction:
c:
To determine
Less preference of self-selected sample:
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What statistic does Richard Freeman say that if an economist had predicted it, he/she would have been carted away as mad?
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Twenty different statistics students are randomly selected. For each of them, their body temperature
(°C)
is measured and their head circumference (cm) is measured.
a. For this sample of paired data, what does r represent, and what does
ρ
represent?
b. Without doing any research or calculations, estimate the value of r.
c. Does r change if body temperatures are converted to Fahrenheit degrees?
Question content area bottom
Part 1
a. Choose the correct answer below.
A.
r is a parameter that represents the value of the linear correlation coefficient that would be computed by using all of the paired data in the population of all statistics students, and
ρ
is a statistic that represents the value of the linear correlation coefficient computed from the paired sample data.
B.
r is a statistic that represents the proportion of the variation in head circumference that can be explained by variation in body temperature, and
ρ
is a parameter that represents…
Chapter 5 Solutions
Statistics for Management and Economics (Book Only)
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