ECO220Y: Homework, Lecture 16
Readings:
Section 8.2, “Handout –lecture16” (posted on the portal. Go to “Content” – “Handout lecture16”),
and Section 8.4 (excluding
2
)
Exercises:
8.15 – 8.33, 8.38, 8.46, 8.48, 8.52, 8.58, 8.64, 8.69, 8.70 (Note: Use table in “The Standard
Normal table: Read it” to do these exercises), 8.83, 8.84, 8.95, 8.96
Applets (CDROM):
Applet 4 (page 260), Applet 5 (page 265), Applet 6 (page 285), Applet 8 (page 292)
Problems:
(1)
Suppose students’ heights (X) are normally distributed with mean 168 cm and s.d. 8 cm.
(a)
What is the probability that a randomly selected student is taller than Rafael Nadal (186 cm)?
Illustrate your answer with a graph.
(b)
Suppose mean is 170 cm instead of 168 (s.d. is still 8 cm). This means that on average students
are taller. Now, what is the probability that a randomly selected student is taller than Rafael Nadal (186
cm)?
(c)
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 Spring '11
 tanaka
 Normal Distribution, Rafael Nadal, randomly selected student

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