Question

jamal performed an experiment flipping a coin. he did 10 trials and then his arm got tired. he recorded his results in the table. based on the experimental probability, jamal predicted that the number of times the coin lands heads up will always be greater than the number of times it lands tails up. what is the error in his prediction?

coin	observed frequency	experimental probability
tails	2	0.20

he should have performed fewer trials before comparing them to the theoretical probability.
he did not need to perform the experiment to compare theoretical and experimental probabilities.
he should have subtracted the theoretical probability from the experimental probability.
he did not perform enough trials to compare the theoretical and experimental probabilities.

Explanation:

Experimental probability is based on a limited - number of trials. For a coin - flip, the theoretical probability of heads or tails is 0.5. Jamal only did 10 trials, which is a small number. A small number of trials may not accurately represent the true probability. So, his prediction based on such a small number of trials is unreliable.

Answer:

He did not perform enough trials to compare the theoretical and experimental probabilities.