Question

A coin was flipped 150 times. The results of the experiment are shown in the following table:


Heads Tails
90 60


Which of the following best describes the experimental probability of getting heads?
It is 10% higher than the theoretical probability.
It is 10% lower than the theoretical probability.
It is equal to the theoretical probability for this data.
The experimental probability cannot be concluded from the data in the table.

Answer 1

The experimental probability cannot be concluded from the data in the table.

Answer 2

The experimental probability of heads is 90/150 = 0.6
If the coin was fair, the theoretical probability of heads is 0.5
Therefore the experimental probability of heads is
\[\large \frac{0.6-0.5}{0.5}\times\frac{100}{1}=20\ percent\]
higher than the theoretical probability of heads.

So none of the answer choices is correct.