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

Question

Quizplus · Accepted Answer

The test statistic R is calculated based on the difference between the observed number of heads and the expected number of heads if the coin were fair. With 30 flips, the expected number of heads is 15. The observed number of heads is 18. Using the formula for the test statistic for a binomial distribution, the value is approximately 3.07.