HOMEWORK Solutions
Section 6.1 - 7,8,9,10,14, 15
Section 6.2 - 22,25(a) (use the results from Example 6.17)
28(a), 32
7
a.
xi 1206 120.6
x
n
10
b.
10,000 1,206,000
c.
8 of 10 houses in the sample used at least 100 therms (the successes), so
8
p 10 .8
HOMEWORK Solutions
Section 5.1 - 1,2,3, 6(read the hint for (a), this one is hard),7,9,13,15
Section 5.2 - 22,25,29,30,31
Extra Problems
1
a.
P(X = 1, Y = 1) = p(1,1) = .20
b.
P(X 1 and Y 1) = p(0,0) + p(0,1) + p(1,0) + p(1,1) = .42
c.
At least one hose i
Homework SOLUTIONS
Section 4.2 - 11,13,15,20,27
(for 11 use the formula that the probability that X will be greater than or equal to a and
less than or equal to b is F(b) -F(a)
The next problems are exercises in using the table on the front flap of the te
HOMEWORK Solutions
Section 7.1 - the z-intervals (use these if you know )
Section 7.1 5,6,7
Extra Problem (my version of Problem 8)
Assume X 1 , X 2 , ., X n is a random sample from a normal population with mean and
variance 2 . Let be a small positive nu
HW Solutions
Section 4.3 - 46,47,49,51,52,53
46.
a.
P(67 X 75) = P(1.00 Z 1.67) = .7938
b.
P(70 c X 70 + c) =
c
c
c
c
P
Z 2( ) 1 .95 ( ) .9750
3
3
3
3
c
1.96 c 5.88
3
c.
10P(a single one is acceptable) = 7.938
d. p = P(X < 73.84) = P(Z < 1.28) = .9, so
Bonus Poker Homework Solutions
Section 2.4 - 50,59,64,65
Extra Problem
50
a.
P(M LS PR) = .05, directly from the table of probabilities
b.
P(M Pr) = P(M,Pr,LS) + P(M,Pr,SS) = .05+.07 = .12
c.
P(SS) = sum of 9 probabilities in SS table = .56, P(LS) = 1 - .