Question

Susan rolled a number cube 40 times and got the following results. Outcome Rolled 1,2,3,4,5,6 Number of Rolls 0,4,3,5,2,6 Answer the following. Round your answers to the nearest thousandths.

(a)From Susan's results, compute the experimental probability of rolling an even number. ___
(b)Assuming that the cube is fair, compute the theoretical probability of rolling an even number.
(c)Assuming that the cube is fair, choose the statement below that is true. With a small number of rolls, it is surprising when the experimental probability is much greater than the theoretical probability. ___
(c)Assuming that the cube is fair, choose the statement below that is true.
Select one of these:
1. With a small number of rolls, it is not surprising when the experimental probability is much greater than the theoretical probability. With a small number of rolls, the experimental probability will always be much greater than the theoretical probability.

2. With a small number of rolls, it is not surprising when the experimental probability is much
greater than the theoretical probability.

3. With a small number of rolls, the experimental probability will always be much greater than
the theoretical probability.

Answer 1

Explanation:

(a) Experimental probability of rolling an even number = (number of rolls for 2, 4, and 6) / (total number of rolls) = (4 + 5 + 6) / 40 = 0.375

(b) Theoretical probability of rolling an even number = number of even outcomes / total number of outcomes = 3 / 6 = 0.5

(c) Statement 2 is true: With a small number of rolls, it is not surprising when the experimental probability is much greater than the theoretical probability.