Question

A jar contains black marbles and green marbles. Sixty percent of the marbles in the jar are green. A number generator simulates randomly selecting 10 marbles from the jar. The number generator is used 12 times and the number of green marbles in each trial is shown in the dot plot.

Which description is correct about the number generator being fair or not?




The number generator is not fair. The dot plot shows 80% of the marbles drawn are green.

The number generator is fair. The dot plot shows a distribution that is skewed right.

The number generator is not fair. In most of the experiments, considerably less than 60% of the selected marbles are green.

The number generator is fair. It shows that 60% of the marbles selected are green most of the time.

Answer 1

The number generator is not fair. In most of the experiments, considerably less than 60% of the selected marbles are green.

Explanation:

Run a significant number of times, a fair distribution should be a bell curve centered on the 6 for 60%