Chapter 7 Worksheet: Answers. Chapter 7 Worksheet: Answers. Practice 1: 45.
Practice 2: a). 1. 13 b). 1. 26 c). 1. 2 d). 1. 10. Practice 3: 0.6. Practice 4: 0.9.
Chapter 7 Worksheet: Answers
Chapter 7 Worksheet: Answers Practice 1:
45
Practice 2:
a)
Practice 3:
0.6
Practice 4:
0.9
Practice 5:
5 6
Practice 6:
5 6
1 13
1 26
b)
c)
1 2
d)
1 10
Practice 7:
Event:
0 Heads
1 Head
2 Heads
3 Heads
4 Heads
Probability:
1 16
4 16
6 16
4 16
1 16
Practice 8:
a) Odds for are 1:2 b) Odds against are 2:1 c) Odds on are 2:1
Practice 9:
a) 0.52
Practice 10:
a)
1 16
b)
1 216
c)
32432400 0.00316 10260432000
d)
e)
1 6
f)
1 2
g)
9 10
i) 0.737856
b) 0.10
c) 0.59
d) 0.21
h)
91 216
e) 0.84
1 13
Chapter 7 Worksheet: Answers Practice 11:
a)
1014 0.986 1028
b)
636 0.619 1028
Practice 12: You should not expect to get exactly 5000 heads. The proportion of heads should approach 0.5 as the number of tosses increases.
Practice 13:
Expected value: -$0.25; after 100 games, you can expect to lose money.
Practice 14:
a) 46% heads; net gain = loss of $8 b) Yes, this result is consistent with the law of large numbers since the percent heads is getting closer to 50%; net gain = loss of $18 c) You would need 59 more heads. This is possible, but unlikely. d) The probability of getting a head is always 0.5.
Practice 15:
Expected value for a single ticket: -$0.54; you can expect to lose $198.10 in 1 year
