STA 2023  Quiz 1
/ Summer A 2011
June 8th, 2011
There will NOT be any partial credit for the multiple choice questions. Good
luck!
Name:
UFID:
Formulas:
•
If
X
∼
Bin
(
n,p
), then
E
(
x
) =
μ
=
np
and
standard deviation =
σ
=
q
np
(1

p
)
•
Binomial PMF:
P
(
X
=
a
) =
±
n
a
²
p
a
(1

p
)
n

a
for
a
= 1
,
2
,
3
,...,n
•
Choose function:
±
n
k
²
=
n
!
k
!(
n

k
)!
•
Standard Error of ˆ
p
=
q
p
(1

p
n
•
Standard Error of
¯
X
=
σ
√
n
Each question is worth the same.
1. In the NBA playoﬀs, Jason Kidd has averaged 7.4 assists per game with a standard
deviation of 2.89. Suppose Kidd’s assists per game are normally distributed. Find the
probability that in his next game, Jason Kidd gets more than 8 assists.
(a) 0.208
(b) 0.421
(c) 0.579
(d) 0.643
2. Find the 20th percentile of Jason Kidd’s assists per game.
(a) 0.208
(b) 0.84
(c) 1.48
(d) 4.97
1
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View Full Document3. Suppose I have 10 cookies, 3 chocolate chip, 3 peanut butter, 2 snickerdoodle, and 2
oatmeal raisin. Find the expected number of chocolate chip cookies that I will get if I
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 Spring '08
 Ripol
 Statistics, Binomial, Normal Distribution, Standard Error, Probability theory, Jason Kidd

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