Consider an experiment of tossing a fair coin 100 times and counting the number
ID: 3317448 • Letter: C
Question
Consider an experiment of tossing a fair coin 100 times and counting the number of heads. The probability of getting exactly 56 heads is about 3.9%. The probability of getting any number of heads greater than 56 heads is about 49.6%. What is the best way to characterize a result of 56 heads? How about any result greater than 56 heads?
A. A result of 56 is likely. A result greater than 56 would not be unusual.
B. A result of 56 is unlikely. Any result greater than 56 would be unusual.
C. A result of 56 is unlikely. A result greater than 56 would not be unusual.
D. A result of 56 is likely. Any result greater than 56 would be unusual.
Explanation / Answer
A result of 56 is unlikely because its probability is 0.039 which is less than 0.05 but at the same time, a result greater than 56 is not unusual since its probability is 0.496.
Hence,
Option C is correct.