Exhibit 20

Multiple Choice

Exhibit 20.12.A magician has a coin that may or not be fair.The results of 30 flips of the coin are: H H T H T H H T H H T H H T H T H H H T T T T T H H H H H T. Refer to Exhibit 20.12.Since the number of heads and tails are larger than ten,the test statistic R can be assumed to follow a normal distribution.The value of the test statistic is:

A) -3.07
B) 14.93
C) 0.3484
D) 3.07