There is a number cube with faces numbered 1 to 6. There is also a coin with one side marked as heads and the other tails.As a trial of an experiment, the number cube was rolled and the coin flipped. The number 1 to 6 from the roll and the side H for heads and T for tails of the coin from the flip were recorded.Here is a summary of the data from 70 trials.Outcome 1H 2H 3H 4H 5H 6H 1T 2T 3T 4T 5T 6TNumber of trials 3 7 7 3 8 5 8 5 6 6 4 8Answer each part.(a) Use the data to find the experimental probability of this event: both rolling an even number and flipping heads, in a single trial. Round your answer to the nearest thousandth.(b) Assuming the cube and the coin are fair, find the theoretical probability of this event: both rolling an even number and flipping heads, in a single trial. Round your answer to the nearest thousandth.(c) Choose the statement that is true.
Question
There is a number cube with faces numbered 1 to 6. There is also a coin with one side marked as heads and the other tails.As a trial of an experiment, the number cube was rolled and the coin flipped. The number 1 to 6 from the roll and the side H for heads and T for tails of the coin from the flip were recorded.Here is a summary of the data from 70 trials.Outcome 1H 2H 3H 4H 5H 6H 1T 2T 3T 4T 5T 6TNumber of trials 3 7 7 3 8 5 8 5 6 6 4 8Answer each part.(a) Use the data to find the experimental probability of this event: both rolling an even number and flipping heads, in a single trial. Round your answer to the nearest thousandth.(b) Assuming the cube and the coin are fair, find the theoretical probability of this event: both rolling an even number and flipping heads, in a single trial. Round your answer to the nearest thousandth.(c) Choose the statement that is true.
Solution
(a) The event of rolling an even number and flipping heads corresponds to the outcomes 2H, 4H, and 6H. From the data, we can see that these outcomes occurred 7, 3, and 5 times respectively. So, the total number of times this event occurred is 7 + 3 + 5 = 15. The experimental probability of this event is then the number of times the event occurred divided by the total number of trials, which is 15/70 = 0.214. Rounded to the nearest thousandth, this is 0.214.
(b) The theoretical probability of rolling an even number is 1/2, since three out of the six possible outcomes (2, 4, 6) are even. The theoretical probability of flipping heads is also 1/2, since one out of the two possible outcomes (H, T) is heads. Since these two events are independent, the theoretical probability of both events occurring is the product of their individual probabilities, which is (1/2) * (1/2) = 0.25.
(c) Without knowing the specific statements to choose from, I cannot answer this part of the question.
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